Flite Test - Lipo Battery Bunker

[@StereodreieckRC]

I use the balance program everytime.

[@mauricioalves8860]

Well, personally, I think that the best lipo bunker is something like an Outdoor Barrel Charcoal Grill with Side Table and wheels (that costs less than a hundred bucks). And the key word here is outdoor, outside - or at least, a balcony. Another important aspect is that you will have fire and smoke isolation (by just closing the barrel), because you can choose to place the grill with nothing nearby... you can open and close the barrel... and some even have a small chimney that will direct the smoke (that you can add more tubes to make the smoke go much higher). Definitely you guys should try that out and perhaps make a good video about this option, putting some old lipos on fire to see the results.

[@Trainedn00bdotcom]

I love the idea of sticking them into the cinder block holes with the sandbag over it. If one battery goes up in flames the rest won't! I love it, still a great idea with the battery bunker Josh! I also use the ammo boxes for tools, electronics and food! They are watertight and can take a beating. Thanks for the video guys, keep it up!

[@MrDan1713]

In the case of ammo cans, lining them with cement board will insulate the metal can so it will be less likely to transfer heat to the surrounding area.

[@SYNFPVPILOT]

Great tips and love the bunker idea. A friend had a spontaneous lipo fire this weekend on a camping trip that could have cost him his car or worse if he was driving. The lipo was old and sitting idle in a gym bag with others. One cell decided to party. If I didn't see it I wouldn't believe it could happen like that.

[@chuckworley3096]

As usual a great video. I had my lipo battery bunker built into my house. Now that all of the children have graduated collage and left home I took over the family room. The family room has a fire place with tempered glass doors. I just put my battery in a charging bag, place the bag and charger in the fireplace and close the doors. I have a fire extinguisher handy, but I think I’m going to put a bucket of sand close by as well. Thanks

[@cha3119]

Extra good video. Please keep this topic active, creating occasional safety videos. The risk of having lipos in my home really sunk in a while back and I don't believe enough is done to help the flyer keep this in mind. Especially if you fly nitro, too and all your materials are kept together. A lipo explodes and your nitro goes up as well - keep them separate.The idea of putting the bag of sand above the concrete block pocket is excellent, maybe better than the concrete board on top. Thanks, keep up the great info!

[@WVRick]

For years I've used a Treadplate Steel 20x10" toolbox on the floor with pavers brick between the box and floor. Away from anything flammable. Ammo cans for storage.. Great video!

[@CraZyCarl6212]

After seeing a lipo fire at my local track recently, I built my own lipo bunker. I used 2" tall 12"x12" patio blocks on the floor. Then put standard cinder blocks laid on their sides on top so the 2 hollowed out spaces of each block are faced up. That gave me 4 separate compartments total. 3 of them are used for battery storage, 1 is used only for charging. I also added an extended balance lead to my charger so the charger can be kept away from the charging battery. I like the idea of the granite board used in the video, Ill buy some of that to make a top. My favorite suggestion though is the bucket of sand, so inexpensive yet effective counter to a lipo fire. Also the smoke alarm, ill be adding that too. Thank you for the ideas.

[@wallabyrob]

Thanks for making this hobby safer for us . I really appreciate the learning curve you guys provide. Cheers. Oh, and if Dan Wilson doesn't condone your language please know that many of us do.

[@Electronzap]

Learned a lot! I thought up the bag of something above the battery to put out a fire, didn't think of it containing something as simple as sand. Looks really effective.

[@zfotoguy71]

Great safety video! Everyone in the hobby should watch this, especially those who are new to lipo batteries. I use 2 large cinder blocks and charge in the cavity like you showed. Love the idea of putting sand on top. Thanks for being awesome!

[@williamadventures]

This is my first FT Build! Went to home depot and the clerk mentioned the sales rep for the cement board brought a flame torch to show them how resistant it was to fire. I put mine together and happy to have it. One of our local guys just had his car catch on fire. Console, seats and interior. He was charging with an inverter. I do that all the time, too. I'm going to make a mini version to charge while at the field with spare pieces of cement board. Thanks for the great tip! Hope I never have to test the fire capabilities!

[@nishbrown]

Safety is no accident.

[@nateberry9393]

you got that right

[@jameslow5738]

The sandbag over the batteries to let the flame melt the bag and release the sand is an amazing idea

[@DargoDog]

One of the best videos I have seen on LiPo safety! Currently, I have mine charging on an all metal rack (baker's rack) and using old licence plates for the bottom. I do have several larger ammo cans that I have thought about using for charging and storage, but I did not know if it was safe or not. Looks like you guys just gave me my next project!

[@SeanDuffyProductions]

I've always charged my batteries using the balance lead, my charger doesn't have a connecter for the power lead and I wasn't even aware you could do it that way! Is it bad to always balance charge, or is it just slower?

[@DjRio0001]

Not bad at all... Just slower. You're actually likely to have better lifespan in your lipo because of the low C charging. My IMAX can actually do both, so they only discharge by the balance plug but do the bulk of the charging via the XT-60

[@abdumalikmustapha4689]

**Sees battery explode** **Gets flashbacks of my old rc plane** **Sobs**

[@ausguitarist]

I only have 2, 4s 2600mh batteries and i bought some 2, $10 metal toolboxes and lined them, twice with scrap concrete sheeting, the 10mm type. store them seperately in the garage

[@humusiclab8974]

May thanks! Would it work to fill small amp case with sand? Other than being heavy, you could put several batteries in there at once. One battery issue might not set off the others, at least that's the theory...

[@rolandgeorges960]

Better Safe than Sorry. Sometimes we get carried away by minor things and forget the foremost important things. Congratulations guys, very educational.

[@tomsunax]

Thanks for those tips, probably good for many of us to be reminded to be careful with lipos Balance lead extension cables exist (think HK has them) in case you want to put the charger outside the bunker

[@mbainrot]

it's what i do so I can run balance leads into me fire bags

[@Dreiviertel]

I got one of the ordinary plastic euroboxes, inside are freezer bags filled with extinguisher granule. Here in Europe the brand ist called "Extover" or "Fireballs". Basically "foam glass balls" that are melting at high temperatures, drawing energy from the fire and extinguishes it. Costs around 50€ and I got a storage with a passive fire extinguisher.

[@ManuelMcLure]

Please, please, PLEASE stop recommending salt water for discharging LiPos!!!! All that happens in salt water is that electrolysis corrodes the terminals of the battery before the battery gets anywhere near full discharge. The correct way to discharge a LiPo for disposal is to use a resistive load, such as one or two taillight batteries in series.

[@kirkglundal4289]

Yes, Salt water is NOT a solution for lipos. For a little more than the cost of a couple pounds of salt and takes up far less room than a pail of water you can use this: URUAV Lipo Killer. www.rcgroups.com/forums/showthread.php?3270863-The-Perfect-Lipo-discharge-tool-URUAV-Lipo-Discharger-how-to-Hack-DIY

[@Enzo-kl2vc]

Also, DON'T use an AMMO BOX if it is airtight. LiPos absolutely need holes for gas to vent out, otherwise the pressure will build up inside the ammo box, effectively turning it into a BOMB. Ammo boxes are great IF you drill holes in it for gas release.

[@antoncasciano8747]

@@Enzo-kl2vc just take rubber seal out

[@StoneBlueAirlines]

Raise your hands up if your wife now hates your hobby even more because you want to build this. ;) Safety first. Thumbs up!

[@garthfpvtv]

***** Tell her that and you might get the ultimatum you don't want.

[@PHeMoX]

If you truly believe in Safety First, you really wouldn't ever need a lipo bunker.

[@garthfpvtv]

lol. watch the news and listen to politicians.

[@ColtonB]

***** My girlfriend heavily supports me! I'm sorry for all those who have un-supportive spouses! I know a guy who just drilled a hole in the top of a safe and drops the battery in while charging. He had extended cables of course. I really need a safe area to charge my batteries!

[@RCBound]

***** My girlfriend heavily supports me! I'm sorry for all those who have un-supportive spouses! I know a guy who just drilled a hole in the top of a safe and drops the battery in while charging. He had extended cables of course. I really need a safe area to charge my batteries! **originally posted from wrong channel**

[@SuperJaveline]

...will it blend?.... ...ah....wrong KZbin channel ;) ...but, seriously, it's good to see a well known player in the rc scene promoting awareness and safety message. Well done guys, really glad I subbed to your channel.

[@RackwitzG]

I‘m starting to get back in the hobby again after a 25 year break and can‘t get around lipos if I want to fly. I’m freaked out by the thought of a fire. I live in an apartment and have no outside area to charge or store my batteries, nor a garage. My only hope is to not make mistakes and hope an ammocan holds up. I guess you have to be brave in this new world... :D This Vid was very helpful, thanks.

[@MrGantzFan]

How do you guys recommend safely storing batteries? I currently use lipo sacks, but admittedly overpack them. It gets to be expensive to use 1 lipo sack for 2 or 3 lipos. Is it safe enough to store 4 to 6 in a single ammo can?

[@heatherryan9820]

I'm just curious, could you use baking soda to put it the fire instead of sand?

[@ChongMcBong]

Am i safe keeping 20 lipo batteries together in a sealed ammo case? They are all 1 cell, and are under 500mAh, and have individual slots in a lump of foam, so i assume they are reasonably safe, but does my ammo case need a vent to stop it blowing up? I like the cinder block charging bunker idea, that looks safe, I'm just worried about my ammo case going off like a grenade if something happens to one of my sleeping batteries, also thinking it will shoot flames out if i cut a vent in it, so need some advice...

[@geoffreygoerlich1499]

Is that the new Sukhoi SU-29MM BNF Basic by ParkZone in the background?

[@kokoslegend4850]

Why would a charger overcharge them with the balance plugs in?

[@AzaanUiX]

I have a gens ace 2500 mah 11.1 volt . I left it unused for a few years and when i found it , it is slightly puffy . Should i recharge it and reuse it normally?

[@evhexrc1765]

Very helpful! I love the ideas! Keep it up! Would charging lipos in a glass mason jar with a metal lid that has a small hole cut in the top to run the leads to the charger?

[@mbainrot]

no not good idea as the heat will shatter the glass

[@dave_s_vids]

So where are you all storing your batteries overnight? I only have 3x 1000mah 3S batteries currently so they sit overnight in a lipo bag on a tiled floor away from anything combustible. Is it worth getting a metal can to keep them outside in?

[@302elite]

I have heard from a great community of people that say you can not leave your battery fully charged or that can puff it if I sit over time. When a battery puffs up it damages the cells in the battery. One thing to try. Try a puffed 3 cell pack and a regular 3 cell pack put together o the same plane. Well when you bring it back the puffed pack will have a lot less voltage left than the regular pack.

[@rufo]

Could one store and/or charge LiPo batteries in an old casserole with a lid on it to contain any flames or heat within it?

[@AlvinBustamante]

Is there a maximum length for balance wires? I want to charge my battery inside an ammo can lined Hardiebacker.

[@hammerdown6998]

Hey Josh. I got a Floureon 4s 5.0 35C. Rotated my propstations 90 degrees and flipped them upside down so I could do run up tests and measure voltage and amperage draw for setting up my AMP. I've flown 3S before but flight time is only about 9 minutes. I just want to do aerial photography, not interested in stunts. Quad is an X 525, SunnySky 980KV motors spinning 12" props. After the battery drained down I shut it down. It was swelled a bit. I let it cool and now the charger says, "Low Voltage" and wont charge. Measured voltage is 11 volts. Any ideas?

[@lennertbontinck]

i'm going to build a tricopter together with my dad this vacation, wich one would you recomend? Just the scratchbuild you made a vid of or something els? It is my first tricopter and 4th multirotor... I'm going to use it for fpv so next question is, wich fpv system would you recommend?

[@benjaminvanbrande38]

Well if you just want a tricopter and your dedicated to that I would go with the Bat Bone TRI shop.flitetest.com/multirotors/bat-bone-tri-370-kit/ But if you wanted somthing that later on you could change to a quad or what ever i would go with the anycoptoter becuase that gives you more diversity and its also a little bit cheaper. I hope this helps. :)

[@Ghostrider03Z]

Probably buying or cutting your own frame plates of davids tricopter and building from there would be the best. If you want to spend some more money on a frame, you could buy a turnigy talon frame or something similiar. Then 5.8 fpv would be the best to start. If you are curios as to what you need for a 5.8 system i have a video on my channel.

[@lennertbontinck]

thanks guys!! I I'm probably going to follow David's built and for fpv I might go for a cheap boscam fpv setup with my mobius connected :D anyone has experience with boscam? i might buy a set from banggood but I have no experience at all with fpv setups... Is this one good? I want at least 100 meters of range and i'm going to connect a mobius or a cheap board cam...www.banggood.com/Boscam-FPV-5_8G-400mW-AV-Receiver-RC805-With-Transmitter-TS353-p-918123.html thanks!

[@keylitho]

I'm surprised you didn't mention thermal sensors.. I have a Triton 2 and it has a thermal sensor that you put on the battery and it shuts off the charger if the battery gets too hot.

[@littleraptor9898]

iam planning to go on a month-long vacation, but i have 3 LiPOs at home. 2 of them i never used and i have them for 7 months (i know its not good to buy some, not using them but my RC car keeps breaking). all of them are storage charged. can something bad happen with them? i will put them in my garage, i have nothing flammable there, but is it safe?

[@KenAllison-AVH-Australia]

Good and informative video. Do DJI phantom 2 chargers balance the cells as they charge?

[@TROYJDONAHUE]

I saw a test where with these ammo cans the fire did more damage with the seal in the lid, when the seal was removed not as much damage

[@Prem_hall_713]

so, I have a few one cell lipos, I was wondering if I still need to store, and watch my batteries charging? they don't have balance plugs, so are they safer than other lipos?

[@DjRio0001]

Please correct me on this one: Aren't home smoke detectors really just light sensors detecting slight variations in light caused by smoke? If that's the case, would it work in a pitch black box?

[@traviswright2174]

There's actually a microgram amount of Americium inside of them, which is a radioactive element. It's so small the radiation is harmless. And a sensor which detects the small changes in the radiation due to smoke.

[@henningschaferhoff1533]

Travis Wright there are two versions commonly available the one with americum and others with a light and a light sensor which is reacting to the smoke

[@TheTechOnline]

Americium ionises the air in normal conditions which produces a small charge which the detector picks up. When smoke goes into the detector it cannot ionise as much air so the no charge is produced which sets of the alarm. British GCSE Physics knowledge for your there!

[@CDC444RC]

I am making a version of this but I am using all cement board (no bricks). I'm also planning on making some smaller sections inside to hold each battery and put sand bags on top on these sections to put out any fire asap. The whole thing will be in a larger bunker in case the first compartments or sand method fails. What glue could I use to stick the cement board together. Gorilla glue works well to stick but in tests it loses strength quickly when heated with a flame. What else could I try that is cheap and easy? Thanks for any help!

[@CDC444RC]

+CDC444RC Anyone?

[@BubbaCZekLP]

+CDC444RC in your local shop you should be able to find a heat resistant glue, Which is normally used on chimney.

[@CDC444RC]

+BestLeblancEUNE Thanks. I ended up using a fire sealant and so far its worked fine. Tested by burning some paper inside and it works good so far. If I put a blowtorch to the glue it quickly weakens so it is not 100% fireproof. I use the sand bag on top method so it should how up long enough to melt the bag.

[@BubbaCZekLP]

Great!

[@LIFEOFSTUFFEDANIMALS]

I have noticed with great interest that there is a Park Zone Sukhoi SU-29MM behind you. Will you guys do a video specifically on that RC aircraft soon? I have heard many great things about it, and since you guys are amazing at reviewing RC planes, I thought it would be likely.

[@matusknives]

Awesome video, thank you. I will definitely be building something along these line in the garage to minimize any potential damage.

[@jkspinalchoice]

wow!!! This show was probably one of the most important one I have ever watched. I knew these batteries had the possibility of catching fire, but NEVER did I know to that extent. I fly the Phantom 2+ Just went into my Gun Safe, and pulled out one of my ammo boxes, and am using setting up as you showed in show. To test the batteries that I have, is there a particular device to use, or the one you were using does all sizes? Guys, as usual Great job!!!! John Kaddouri

[@drkastenbrot]

A generic lipo checker will do that. The lcd ones.

[@mrlegodude96alt2]

+John Kaddouri Quick note if your using military grade ammo boxes they're air tight so if there is a fire the pressure will build up until it blows the top off, I have small holes to relieve the pressure.

[@optionalcoast7478]

+mrlegodude96alt2 well it would be the opposite since the fire would consume the air in their but still bad

[@mrlegodude96alt2]

Optionalcoast74 I've blown up multiple ammo boxes with old batteries to prove this point lol, either way it's still a fire in a pressurized container.

[@PaulKruskamp]

+mrlegodude96alt2 what could go wrong?

[@aniluvsw16]

Hey there... I have a quad and just today i ran it without a low voltage alarm... Till now i have run my batteries down to about 10.6v (ie...3s 2200mah pack) and they have still gotten a little puffy and today i ran it down to 9.6v by mistake... What are the chances my battery is going to give up on me ???

[@ToekneeToe]

Get long leads for your charger. That way you won't hurt your charger. Make sure you have proper gauge wires. You can also use pots and pan with heavy lids or put stuff on top of the lids. You can put a ceramic or corning glass plate/bowl inside too. Thanks for get Video!

[@garyhale5645]

Line the inside of your large ammo cans with another layer of protection. If kept inside weld a piece of muffler pipe to the can and cut out circle in the can. Drill a hole in the side of the building to the outside and run pipe thru it to the outside. Epoxy a piece of screen to the end of the pipe using rubber bands to old in place till epoxy drys. Keep seal on can if you vent outside so it doesn't leak smoke into the room

[@davidgibson1524]

I have one battery that is out of balance by .1 volt, should this one be neutralized and discarded?

[@TheHouseBlog]

I'm really surprised that there are people who don't balance on every charge. Not saying if it's wrong or right, but rare. With the people and fields I fly at that is virtually unheard of aside from the occasionally new guy. We also deal with larger packs like 12s and such so maybe it's just more common with the higher cell count packs.

[@hakont.4960]

If the battery cells are resistance matched it's in most cases not necessary to balance the cells each time. I don't balance the cells each time, but I always connect the balancing plug and check the cell voltages. Usually the cells are balanced to within .01 volts, and stay balanced even if I don't balance them every time. I do balance them occasionally, just to be safe of course, and always store them with optimal cell storing voltage.

[@PHeMoX]

Yes, always do a balance charge. There's no point not to.

[@hakont.4960]

PHeMoX Unbalanced charging takes less time, and isn't a problem with high quality battery packs and if you know what you're doing. I occasionally check the individual cell voltages with a multimeter just to be safe.

[@nossrc5638]

If I have 6 lipos inside the military box and one burst damages all the others?

[@johnrobinson1140]

I'm trusting that slow balance charging of good quality batteries with my EZ PRO DUO will help keep me safe. I never leave them alone while charging, I check the batteries to see if they're getting warm or hot, and today I will probably check them with my Klein multimeter when they get close to charged just to make sure there are no discrepancies. And even then I dont really feel safe. 🤔

[@eddielane9569]

Make sure to remove the black rubber seal from the top of the ammo can so it won't catch fire and it could also build up pressure in the can and cause it to explode. If you use a ammo can or other metal container make sure to set it on something that won't catch fire like wood or plastic or line it with sheetrock or cement board.

[@BeginnersTech314]

very important info. I just had a fire from a lipo and lost all my RC stuff and almost everything in the house. you can't put them out. great information.

[@KARR2001]

Hi everyone. I just bought the E-Flight Apprentice S 15e. I'm looking for suggestions on a charger. Right now I have the one from the box that I have to connect to the car battery. I'm having a hard time finding the charger/power supply which would be good. I currently have 2 LiPo batteries.

[@Tokatt]

if you cut out the oxigen will it still burn or not? Like if I keep it in a air sealed box can it catch fire?

[@Commandodesigns]

Well done. Yes, the big one is .50 cal and the little one is 7.62...

[@locouk]

Great tips guys, I didn't know about the sand for a lipo fire.

[@mikeberg22se]

Good info. Why not put a block between the charger and battery as well. That way you save the charger if the battery fails.

[@MountainSnowFlyer]

What is the best way to dispose of old lipos and partially burned ones?

[@superdon1chw]

I looking for a large barbecue that someone put out and I will charge in the back yard while I am away, what do you guys think?You know if it rains it not a problem .

[@pricelessppp]

So i do not have to use ceder blocks?Just a Ammo box?

[@BanditLeader]

You can use either or. You can also combine the 2

[@soulis1000]

There is extension cord for the balance Cable too you know? Keep your charger outside and just the battery inside.

[@CKOD]

I use a ammo can personally. I lined it with 2 layers of 1/2" drywall, which is surprisingly flame resistant. (seriously, try it out, I took a propane torch to the drywall for 1 minute, the paper on the torch side charred, but it treated to not catch fire, and the other side didnt even discolor, despite the torch side being orange hot where the flame was hitting it when I pulled the torch away) Also, I emphasize the point of the fumes being quite nasty. If youre charging in a garage (or any other closed space)and the smoke detector goes off and the garage is full of smoke, the first thing you should do is ventilate. Dont worry about the charger, or anything else, get the fumes out first.

[@jimfang2090]

your lipo bunk you tube segment rotated to the top of my you tube page. THANK YOU !!, great info

[@agrsk8r]

My Turnigy Accucell 6 won't even charge without using the balance cable... unless I'm charging single cells, of course. If you care for your batteries and want them to last a long time, it just makes sense to keep them balanced anyway. I've also observed, since I picked up that HK-010 Power Analyzer, that if you drop below 7% or so, that's usually where the cells start to unbalance. So that's one reason it's important to try not to drop below 10%. I didn't know that it was the law to carry lipos in a fire proof bag on a plane. But when I moved from Germany back to the U.S. a couple of months ago, I threw all of my batteries in my charging bags anyway because it just made sense to play it safe. I've been curious as to why they never said anything to me. Now I know.

[@Aussiemosis]

What about how toxic the smoke is? Or was it mentioned in the video and I missed it?

[@danamiller7309]

Hi, Can you please help? My 15 year old son just got one of these Syma X5C-1. Someone told me that the Lipo batteries are very dangerous, so I search for videos here on KZbin, and now I'm freaking out. Are these little 3.7 Volts / one cell batteries the same as those bigger ones / multiple cells (used on DIY RC)? Do we need to take the same steps when storing/not using the batteries? Do we need a special charger to put them into store mode? Please help!

[@williwonti]

A one cell is 'balanced' every charge so the likelihood of it ever burning is close to null. Even multicell LiPos are really safe if they're not overcharged which won't happen if you balance charge them. Don't worry. If the battery gets more that a tad bit 'puffy' then you should recycle it and get another just to be safe.

[@danamiller7309]

williwonti thank you

[@CJKozzSTC]

It's ok I use lipid all the time! So you need to put batteries in storage mode when you are done, ask your local hobby shop about storage. DO NOT over run them, what I do is when it just starts to act slower LAND IT. And lastly, do not go over 3 cells, 4 and above are waaaaaaay too powerful. If you are feeling lazy ask your hobby shop. And to make you feel unsafe about this advice, I'm 14!

[@CJKozzSTC]

Soon when your son gets more in the hobby, he will understand what too much power is. Here is a good list of the stuff you need (don't make a bunker unneeded) Lipo charger with balance Battery (not above 3 cell lipo) Eyes (check on the battery) And a brain Don't waste money on a bunker I've been in the hobby for 4 years so trust me, just watch it and make sure everything is plugged in right

[@danamiller7309]

ColinTastic thank you

[@richt2633]

Hey guys, what is the small fire detector brand shown in the video? Thnx!

[@whitehedr]

Great tips on SAFE battery charging techniques. I really like the one you payed forward from Utah Flyers. ROG

[@4444mongo]

Why is balance plugs so short? Can i make the longer

[@ethanfilewych6754]

What is the maximum range in safe range like how many tenths can a cell be apart before it is unsafe?

[@GoldSlidePark]

Very informative video, guys. Thank you and thank camera man.

[@michaelsacca946]

is there a video for that beautiful green yak in the background???

[@jaketrumpet001]

Would a metal bucket with a hole in the bottom on the side for the cables with a sand bag on top of the bucket so that if a fire happens the plastic from the sand bag melts and the sand falls on the fire

[@hightech_lowlife]

Great setup! My only tip is a bag of sand on top, in the unfortunate event it will smother fire when the bag rips.

[@freyguyproductions]

Could you do a video on how to safely discharge/dispose of puffed, dead or damaged Lipos?

[@RCSurf]

I see that parkzone Sukhoi 29mm back there when is the review comming?

[@andy-the-gardener]

the sand is the best idea. as long as your in the room (and you should be), you can deal with the situation.

[@n0ukf]

One more idea for the battery bunker, a piece of the cement board between the charger and batteries would help protect it from fire.

[@KenVanPeltKVP]

Ok so i'm now using a 50 cal ammo can my question is do you guys drill any vent holes into them so should you have a battery let go the can vents since their sealed so well?

[@salsun7437]

Drilling holes in an ammo can is asolutely essential, or it could turn into a bomb due to the large amount of pressure released in a lipo explosion! I think there's a video on KZbin testing an ammo can with a lipo explosion.

[@phcalama]

Where did you find the smoke detector you used?

[@lukegibson2110]

is ti the silver guy on the flite test logo?

[@Bugle25]

How would baking soda work in place of the sand to smoother the flames ?

[@fetymann]

Sand is cheaper. Yeah, you can get a big bag of baking soda from the pool chemical section. But sand is easier.

[@DangerDavefpv]

hey guys would a xt60 spark resistor help prolong the life of my race drones flight controller or esc by chance? or is this a waste for race drones? I sometimes run 5s

[@joblessalex]

So why haven't battery manufacturers just built circuits that let one cell charge 100% then flip over and charge the next? Or a board that charges all cells to a cutoff and then kills the current? Is there something I'm missing or are people just slow?

[@littlestworkshop]

Electronics to do that from the main battery connections would have to have mosfets as large as you find in a speed controller. The cost, size and extra weight make it impractical and would also add extra losses and an additional point of failure. Using the balancing connector is the way to go.

[@joblessalex]

***** Surface mount mosfets exist.... They could also be in the charger instead and just have two sets of cables.

[@littlestworkshop]

joblessalex That is what the balancing lead already does, if you connect with the balancing lead then each cell is charged individually (like discussed in the video) but what you suggest above is more or less building a charger into a battery. Of course SMT mosfets exist but it's still impractical and people would not pay for it.

[@joblessalex]

***** Tiny relays.

[@littlestworkshop]

joblessalex Given these will also have to pass motor currents they will not be very tiny.

[@slyztercoreveanged3175]

wow, that set up really is good and cheap. I mean most fireproof bag doesnt have counter measure. They just contain the fire. It is good but still having counter measure is the best. Not only concrete block is good to contain fire. On top of that you have plastic bag sand that will melt and drop the sand if the it catch fire. Seriously this is one of the best set up for satery lipo charging and storing.

[@sc10rs]

Better to be safe than sorry, i only use 2s 3s and 4s lipos atm and i always balance charge, i also keep my lipos at storage voltage so they are less likely to puff, i keep mine in a metal toolbox, i like the idea of those cinder blocks, especially for storing lipos and keeping them segregated so if one goes up, they all dont go up. Great vid guys :-)

[@pompatj5845]

Dear flitetest I have a question Would i need an AMA license to fly at flite fest ? Please reply

[@MannyGunzz]

Can lipo batteries explode if a Lil puffy?

[@rcolborne4123]

I simply use rock wool insulation, cut slits in the middle of block and insert battery. It is 100% fire proof and if you insert the battery deep enough it will have very limited access to air and no external fire and very little smoke. Cheap and effective.

[@patb5266]

Some chargers won't work without balance cable attached. I balance every charge and always use a separate bag for each charge.

[@hairymanjack6767]

Not really the greatest thing to do because it where's the battery down alot and the liposuction won't have a long life but it is good to balance charge it just not all the time I only balance charge my lipo when it is out of ballance.

[@patb5266]

CircuitX I've had no issues charging this way at all. It's not required to balance overtime but as I said some chargers require it> I have one the won't charge without balance cable and bought a new one that will balance without as I need one to LiHV.

[@glorylord6]

Wouldn't it be more efficient to fill the bunker with sand and when you charge the batteries just bury them in the sand that is already there so that if there is a fire and no one hears the alarm the battery still gets extinguished?

[@diggerdanielg752]

So what are you saying, if i always charge my 4000ma batteries with a balance charger and with no more than 4 amp setting. Am I safe???

[@xxander99]

I think that for the most part, yes, but once in a blue moon something can go wrong, so the bunker is an added layer of protection should something happen.

[@fidelcastration8036]

i have a 2s battery that started to get poofy but then just stopped expanding...should i be worried?

[@Alex.Cheesman]

I would get new batteries if I were you