150w Battery Capacity Tester Repair - Easy Fix

Did you leave your 150w Battery Capacity Tester on FULL SEND and Blow it Up?? Quick easy repair!
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[@LeslieIsgrigg]

Another great video of a common type of repair, nice work Joe 🙂 However, I must offer a correction on solder types, it does matter. You should suggest using only Rosin core solder for electronics, and never Acid core solders. Most who watch these videos already know this, don't offer wiggle room for those who don't. A word on alcohol cleaners, most off the shelf are from 70% to 90% isopropyl alcohol the rest is water. Use 100% isopropyl alcohol from an electronics source, otherwise allow the water to dry before powering on. Till the next video, 🤔💭💣💥

[@AveRage_Joe]

Thanks!! Yeah you are right! I always assume others know but I shouldnt assume!🤘

[@LtBRS]

@@AveRage_Joe There's no way out of assumptions, contrary to that foolish popularized idium, ifself packed-full of metaphysical assumptions, they undergird all knowledge. A helpful key is simply formally recognizing, like prerequisites at university, the knowledge scope of your target audience with key reminders (as you did in new component selection). Helpful vid. Thanks!

[@GTrainRx7]

I would just buy a can of contact cleaner. Specifically designed for this purpose, pretty cheap and will last you forever.

[@korishan]

Quick Tip: You can get "free" or "cheap" solder wick by taking a coax cable apart and pulling out the braided shielding to it. Just be sure the coax has copper shielding instead of aluminum shielding (ie, not cheap TV cable)

[@AveRage_Joe]

LOVE THAT!!!

[@electrojessy4270]

Wow i never came ut whit this i use coax cable 1-2 times a week 😂

[@newburypi]

Thanks, I'll give that a try. I'll probably soak it in a bit of Flux too. That should help get the solder to soak up into the mesh.

[@pashko90]

they cost like a 1$ on aliexpress.

[@electrojessy4270]

@@pashko90 yes but it takes 3-7 weeks to arrive

[@petewoodhead52]

Thanks Joe. I have one of these capacity testers and I'm getting ready to use it to test 16 280V LiFePO4 cells. Forgetting to turn knobs off, etc., "Blowing stuff up" does happen so I appreciate this "how to fix" lesson.

[@AveRage_Joe]

Thanks for watching!! It does a great job testing those cells!!!

[@largepimping]

Joe, try putting some flux (paste or liquid, doesn't matter) on that desoldering braid before heating it up. The difference will be night and day.

[@AveRage_Joe]

Oh Yeah thats helps HUGE!!!🤘

[@de-bodgery]

I've had several of these...the mosfets are not protected in any way and there is no feedback loop to protect the mosfet. The gate driver is the problem. It runs to hard and has many spikes on it that exceed the gate voltage. Add a 15v zener from gate to drain to help soak up the gate spikes. When the mosfet blows it is not unusual for it to take out other things too.

[@leslarson2642]

Thank you. Failed my first load tester in that exact manner. And I knew the current needed to be adjusted to zero. But I kept the blown tester to repair later. And now I have a procedure and parts reference. Gotta love KZbin.

[@AveRage_Joe]

Thanks for watching! Yeah I knew as well🙃💥

[@newburypi]

I don't always like the smash button, but when I do, I smash the the like button. Thanks for this video. I have one of those discharge things, and have not yet smoked it. Now I'll be better able to fix it if I do, and also be less likely to smoke it in the first place.

[@AveRage_Joe]

💥I Like that!!!!!! Yeah remember to turn the dials down and you will be good!

[@mrhalfstep]

Thanks for this video. I blew up the MOSFET on my tester once before because I monkeyed with the settings to get the watt draw higher, by just a little, and the original MOSFET popped. Found a video that suggested buying a higher quality replacement and using more and better quality heat transfer paste. Did that and I've have been rockin' ever since. Then I connected an 18 volt Ryobi battery to it after turning both knobs all the way in the WRONG direction. If not for finding your video, I wouldn't have known that that little booboo also pops the MOSFET. So I was able to use the extra parts that I bought the last time to fix this up in just a few minutes, so thanks for giving me the exact info that I needed, and in a short concise way. BTW, if you didn't know, you can change the settings on these testers and get enough amps to do a .2 C test on a 100 AH 12 volt LiFePo4 drop in battery, if you provide a small fan to help keep the temp around 65 -70 C. I've also set it on top of a couple of frozen water bottles to run the test. Stay safe.

[@AveRage_Joe]

Awesome glad to hear you gotter going! No I didnt know you could change the settings😲😲

[@mrhalfstep]

@@AveRage_Joe Search on YT and you'll find videos that can explain how to change the "WATTS" better than I could here. You basically push the button until you get to the field you want to change and then push it 2 times to lower or 3 times to raise the value or vice versa, I don't remember. Once you've done that you hold the button until the display runs up or down to the setting you want. As you get close, you can push the button once over and over to inch up on the setting. then just wait a few seconds and it will lock in that last number. A 12 volt LiFePo4, drop-in, 12 volt, 100 AH battery takes about 280 watts (14 volts X 20 amps) for a .2c discharge test. The key is to start with the factory settings and note the temperature when you are testing at the max 180 Watts, or whatever your tester is rated at. Remember that temperature and, after raising the max watt limit (that will be in the video when you find it), just make sure you cool the board so it doesn't get above the factory original temperature limit (I have found that it will go to a somewhat higher temp without blowing the MOSFET, but do that at your own risk). You may find that all you have to do is set it in front of an A/C vent. It makes the unit much more useful on a wider range of batteries. For the record, I use one of the Ryobi 4 inch fans to provide the additional cooling.

[@rimmerd9908]

Chopping the legs off of the components you remove first is best I find, IF you don't plan on reusing them. It makes removing components much quicker and easier as you only have the little legs to desolder and unstick from the PCB.

[@ronostrenski8359]

Well explained. Thank you. An extra step would be to put heat paste under the MOSFET. It’s sitting on a large copper ground plane with lots of vias connecting to the other side. This would increase heat dissipation.

[@AveRage_Joe]

Thanks for watching! YES actually they would probly help a lot!!!

[@TiredOldMann]

Thanks for the video .

[@randylenart9674]

I orderd two of these one worked one didn't the one that didn't the solder didn't take I resoldered it and it works fine liked the video 👍🇺🇸

[@AveRage_Joe]

NICE!!🤘

[@kennethalmond8922]

Yea, mine blew up and I just don't have good luck with repair like this so I tossed it and went with iCharger X8. However, you make it looks sooooo EASY! I wonder about my choice and in any case - thanks for sharing for sure :)

[@AveRage_Joe]

Awwww damn, this was a super easy repair! You can DO IT!!!!

[@aaaa1953]

I ordered on Digikey, next i will unsolder the old mosfet and clean the area. Hope i can restore my unit after alot of smoke. new ones are 50 amp, 200 volt

[@TheJR914]

Nice!😀

[@ceasarbalane632]

Please help. Mine has a different problem. The knobs are responding and its actually discharging the battery as it lowers the voltage when i turn the knobs but the ampere is always zero. Which part do you think is the culprit?

[@BorgOvermind]

Forgot how to reprogram it. Looks like 1-click cycles through settings, 2 when in setting add up to the value and 3 when in setting substract to the value.

[@pulesjet]

I have one just like that.. ALL EARS. I FIND mine is pain in the arse to adjust the setting. Setting the de;pth of discharge one only get one chance you start all over.

[@AveRage_Joe]

YES HUNDO a pain to adjust! Then wait to see if its close lol. They work great for those long discharge test tho!

[@mueckenhoeffer]

$40 for a new one? I paid $125 1981 dollars for my old school 6v/12v load tester. Who says everything is more expensive today? Good on you for doing a repair videos - no reason not to take a few minutes to fix stuff instead of adding to a landfill. Plus it gives one an excuse to perhaps acquire a new tool or 3!

[@AveRage_Joe]

100% Oh yeah I remember those 6/12v testers!!! I love a new tool.....or 3!!!😜🤘

[@garystewart6093]

Average joe is a boss!

[@ff-mu6cc]

nice!

[@patriciagreene2756]

i have a samsung 50 inch no picture or sound need help . The power board seem to have shorted mustcat or whatever you called them thing .Can you check them while in the circuit board ? Thanks for your help !!!! PS. Give the cat more camera time.

[@user-df8ff3ed8u]

Before you took it apart how did you know what Mosfet to buy?

[@AveRage_Joe]

Its been a while but if I didnt mention it in video then I think I either emailed the seller or it was listed somewhere from the seller.

[@N8FLY]

Just found your channel! What is the stuff your using at 5:09 ? And tell us about those gloves! Thanks for the video! I’m about to buy a tester and was wondering if they could be fixed since I’ve seen all the reports of them frying.

[@BorgOvermind]

I replaced the cooler with one from a CPU, there are a few degrees difference, meaning extra gained power.

[@RossTheGenMan]

OMG the sound effects.. especially when you put the grease.. SO funny.

[@AveRage_Joe]

😁

[@tangoalpha8381]

Excelente trabalho 🇧🇷👍🇧🇷👍

[@wayne8113]

Good one Joe, Thanks

[@AveRage_Joe]

Thanks Man!!! Hows it goin up there?

[@GapRecordingsNamibia]

As seen as she was smirking take some of her red nail polish and paint the plastic around the pos terminal red, "Easy ID will it be from then!" BOOM!! 😂😂😂😂 Nice video as usual!

[@AveRage_Joe]

LOL she always smirks at the stuff Im doing!!! Yeah a quick dab of red paint is a good idea. I did it with the cells!😜🤘

[@onthelake9554]

Come on Bro we neeeed a video . Boom !

[@AveRage_Joe]

🤭 I know I know!!😆💥🤘

[@steve64464]

Had this been the latest iphone it would of said "error not genuine apple mosfet" 😀 , Love fixing stuff

[@AveRage_Joe]

LOL for sure!!!!

[@fatninja212]

Hello. Curious did that 48 volt big battery you tested have any bluetooth for phone app. TY

[@AveRage_Joe]

Yeah mine has bluetooth. Have a few vids on that battery on my channel!

[@fatninja212]

@@AveRage_Joe TY Love all your content

[@whereserik]

Quality content. Even better sound effects!

[@AveRage_Joe]

Thanks Mate!!!

[@sjbox]

can you upgrade the Mosfet into a more higher wattage one then upgrade the heatsink? So it can support upto 300w?

[@AveRage_Joe]

Havent tried but that would be AWESOME!

[@mohgujai]

Mine just died, I'm unsure if it's the MOSFET that's broken or not, I hit start and nothing happens. Is there a way to test the existing MOSFET to make sure before speding 1/3 of the cost of a whole new unit?

[@AveRage_Joe]

Yeah you can if you have a digital volt meter. You would set it to the diode setting and check the pins to make sure. Just look it up on google and it shows ya how and what to look for.

[@kirkb4989]

My solder sucker and thermal paste never make the noise that yours do- are mine defective??

[@AveRage_Joe]

RETURN!!!

[@mica7966]

Nice repair 💯

[@AveRage_Joe]

Thanks Mate!!!💥🤘

[@Self.reliant]

I need to order one of those testers

[@AveRage_Joe]

I like it and it works well!!🤘

[@quinnfoster4671]

Was about to buy one of these!

[@AveRage_Joe]

They work great, just remember to turn dials down OR when starting, turn dial slowly to 150w or desired wattage!

[@electrojessy4270]

@@AveRage_Joe ore order 10 MOSFET’s whit the package 😂😂😂

[@caserio323]

about f time. wear the hell you was lol we f miss u joe glad to know you ok how is the family wife and cats?

[@AveRage_Joe]

2 videos in one week💁‍♂️🤣 Yeah work is taking all my time🙄 Cats and the Wifie are GREAT!!💥🤘

[@darrenbenson2606]

@AveRage Joe how is that grow at inverter doing?

[@AveRage_Joe]

Its been Amazing!!!

[@jimmyb1451]

Counterfeit components are an absolute plague. I would have thought by now it would have faded away, but no. Even if a real IRFP260N, looking at the SOA on the datasheet, 150W is up there in dissipation for a single FET! Bit of an optimistic design me thinks. Also a pretty poor design, given that it'll shred itself. Pity you don't have a scope. It would be interesting to see what happens on the gate of the FET at startup. Probably wouldn't be too hard to modify the circuit a little to add a delay that disconnects the gate drive until the uC boots (or whatever the mechanism is that's causing the failure)

[@AveRage_Joe]

I should have known not to buy the CHEAPEST ones I could find for FIVE LOL. Yeah no scope here. Thought someone was sending me there old one but that was over a year ago. Yeah poor design if you forget to turn it down it will BLOW. Only does that on the higher voltage stuff or if you turn it up to fast and go over the 150w mark. If its a single cell its fine and you can full send or leave it on!

[@Oneupthesleevecustoms]

Oh I've smoked like 5 haga

[@AveRage_Joe]

LOLZ Life story! HAA

[@oceanz55]

You are awesome Joe! Glad anytime you upload another video! Thanks again :) EDIT: I was scrolling through the comments and went ' WOAH! ...Mrs. Joe!!' I had no idea Lauren also has a channel! I just subscribed and watched the egg sandwich video and am now contemplating a square egg-pan LOL! Also just to be fair, I guess that would then also make you Mr. Lauren .. HAHA Thank you both!

[@AveRage_Joe]

Thanks and appreciate that! Yeah she has a ch but hasnt uploaded anything FOREVER LOL!!! Mr. Lauren BAHAHAHA...true tho!

[@offgridwithpojectham]

Joe! Where you at Bro?? Miss you man!

[@AveRage_Joe]

Im here! Work has been busy🙄 Should have a vid ready in the next few days tho!🤣💥🤘

[@offgridwithpojectham]

@@AveRage_Joe Sweet! Work work work…. The American Way. BOOM! Looking forward to it.

[@stevepr100]

What to do if mosfet burns board beneath itself and copper tracks blown... any help as I got 2 of these with identical issue.

[@AveRage_Joe]

Hmmmm, Id maybe just add some copper wire for the tracks! Done that for other similar situations.

[@stevepr100]

@@AveRage_Joe tried building up with solder ...angry pixies n magic smoke soon followed, I've ordered some copper strip to try I'll let u know outcome...

[@willgeorge5644]

They have a design flaw, you don't have to do anything wrong to blow it up! I want to find the original manufacturer, you you know who it is?

[@Arek_R.]

150W thru one mosfet? That's too much. They should've used at least 2 to divide the load. Yes once I've managed to get 200W on smaller TO220 package but I would do unconventional stuff like soldering that mosfet first to IHS (copper heat spreader salvaged from old CPU) with it's entire back and then having it slapped on a CPU cooler with some PC thermal paste. At the same time when I had a larger load made using 10 of the same mosfets in parallel, I would do dumb mistake of disconnecting the load at like 40A while it's active and it would turn into a welding machine and completely melt high end gold plated 4mm banana connectors rated to 60A, but the mosfets were unharmed, because I was well within the SOA.

[@AveRage_Joe]

Do you think its possible to add more in parallel or would we need to add other stuff in order to make it work?

[@webdev217]

Joe... Bro! just try... oh damn. never mind I don't know what I am talking about.

[@AveRage_Joe]

Lol🤣

[@GTrainRx7]

I have one just like this, except it has no knobs (tehe!), just push buttons to set things... I always leave it set at the highest (draining LTO cells) and have had no issues. I wonder how different they are?

[@AveRage_Joe]

Nice! Havent seen that model yet. If your only doing single cells then full send is ok and it wont blow. If you leave on or turn up to fast on a higher voltage battery it will blow! Thats what I did was turned it up to fast on a 48v battery and BOOOOOM!💥😆

[@GTrainRx7]

Wait, I take it back, it even says in the instructions not to go "full send" :D

[@lukaskastle]

My Unit is brand new and it only goes up to 3.4A on a Single LiFePo4 Cell.. does someone know, is it broken?

[@AveRage_Joe]

I would say yes unless you are using the small usb cables or small wires. What cell you testing?

[@RemodelCalculator]

Was your screen turning on when it was dead? I have 3 of these dead, and nothing on the screen.

[@AveRage_Joe]

Yeah screen still worked!

[@RemodelCalculator]

@@AveRage_Joe I found the problem Joe, I didn't plug my unit into the power supply :) I'm a complete idiot....

[@AveRage_Joe]

🤣🤦‍♂️

[@DimaTkachenko]

Why would you use this discharger instead of using icharger and regenerative discharge into another battery? Icharger i8 is nice, you can split 16s lfp battery in half and top balance them with it.

[@SuperBrainAK]

Yea good idea! I am building a regenerative discharge setup with my ToolkitRC M8S though due to the limited load and battery capacity of my setup I built a DiY constant voltage DC load so it will dump any unused power.

[@AveRage_Joe]

I use this while using my x6 on other cells!🤘

[@disruptIT]

Mine went boom a few minutes ago :( I can still smell it burnt remains... I thought you could hook it up to 36 volts. Went pop. Or maybe it can handle 36volts and i had the amps to high. Either way it popped.

[@AveRage_Joe]

Whoops😆 Yeah you can 36v but need to start with the dials turned down. Can do 150v if I remember right but again, start with the dials down!🤘

[@disruptIT]

Fixed it...Thanks for the part reference, my was unreadable.

[@AveRage_Joe]

💥💥 Awesome!🤘

[@kswis]

Where you been man? I replaced mosfets on 3 of these little testers. They sent me shit parts so I picked better ones n shell burn off 200 watts n stays at 65c. Let's see that face of yours come back to us!

[@AveRage_Joe]

😆 Oh work has been taking all my time🙄 I am editing a video tho and should be ready here soon. You say you can discharge at 200w now? NICE!!🤘

[@kswis]

@AveRage Joe glad to hear from you n yes. Itll do far more briefly but ya, doubt the rest of the components on the board will live through it. I still keep it bout 175-180. Nice to be able to Frankenstein one of many together for use. Stay healthy n don't work too much, you'll be miserable like me... not ideal

[@AveRage_Joe]

Whoa!!😆 Yeah will have a vid up soon!💥🤘

[@offgridwanabe]

And just like that fixed by Joe

[@AveRage_Joe]

😆💥🤘💪

[@HighTechLab]

Gotta love off grid wannabe, always where the good content is. Hey tell me who else you are subscribed to

[@offgridwanabe]

@@HighTechLab Likely most channels like yours but not a couple on the west coast those guys never have time for subscribers unless you pay them

[@AveRage_Joe]

🤣🤣🤣

[@AveRage_Joe]

💥🤘

[@eliotmansfield]

use a heat gun to pre-heat the pcb - makes soldering far easier

[@AveRage_Joe]

Yeah that would work as well!

[@Thebigmanmetaldetecting]

If your on a budget instead of buying heat sink paste buy a tube of nappy/diaper cream because they are both made from zinc oxide

[@AveRage_Joe]

Interesting, Ill have to look into that!

[@nickgrotta5367]

Thank 👌i blow mine 30 min after it arrived 😂😂😂

[@AveRage_Joe]

🤣🤣🤣💥 Easy Fix!🤘

[@randycollins5981]

Hey Joe, DavidPoz sent me your way, Im looking at the Growatt low frequency inventors and im curious how yours is holding up ?

[@AveRage_Joe]

Nice! Mine is holding up GREAT and Love it. I had a few fan lockup faults in the beginning but a firmware update took care of that! Its been running 24/7 since I hung it on the wall!

[@randycollins5981]

Hey thanks Joe, My biggest load is are half horse well pump so the 6K is more than enough, Thanks again and Thumbs Up !

[@DIYwithBatteries]

How can you find the faulty one if the mosfet doesn't blow up , I mean everything looks good but it doesn't work ಠ_ಠ

[@AveRage_Joe]

I msg the seller and he said its always the bigger mosfet!

[@DIYwithBatteries]

@@AveRage_Joe good to know ;) btw I'm using a resistor ¯\_(ツ)_/¯ budget

[@AveRage_Joe]

😲😲😲

[@innocentidiot9521]

Measure resistance/continuity from pins in MOSFET, If it shows that it's shorted, then it's blown.

[@todamnbad]

mine fried so bad that it burned the pcb, not sure mine is repairable

[@AveRage_Joe]

Whoa!!!

[@todamnbad]

@@AveRage_Joe looks like a little flame shot out, not sure I want to spend 20 bucks on a new mosfet

[@todamnbad]

@@AveRage_Joe would you sell me one of yours?

[@RaithUK]

Now Joe the real question is what would happen if you paralleled up some Extra fets in there.... i mean you'd have more heat to dissipate but i mean half the fun is hacking things to make them better... right.

[@AveRage_Joe]

HMMMMMM.....Wonder if it would work!!!

[@RaithUK]

@@AveRage_Joe I recon it would work fine with the possible exception of over whelming the heatsink/fan lol

[@mikesgarage394]

@@RaithUK You cannot just parallel fets, they will not share equally.

[@RaithUK]

@@mikesgarage394 Yer your probably right.. you would have to have a very well matched set to reduce the impedance deifference that might be present... but still i recon it would work.. i might buy one and give it a go just for fun.

[@mikesgarage394]

@@RaithUK You could make it work, just not as easy as bipolar.

[@OffGridAussiePrepper]

BOOOOOOOOOOOOOOMMMMMMMMMMMMM

[@AveRage_Joe]

😆💥💥💥💥💥💥💥💥💥💥💥💥

[@Lauren-ci6uv]

Did you say "solder sucker"?

[@AveRage_Joe]

New Album???😆😆😆

[@Lauren-ci6uv]

@@AveRage_Joe totes!

[@jtnoodle]

OR return it to Amazon saying it's defective and have another one at your door quicker than you would receive the mosfets.