Battery Tool Experiments: Converting 120V Tools to Battery Power / NiCd to Lithium

[@ThePostApocalypticInventor]

Hey guys, many of you have contacted me recently, asking if I'm safe during the current flood crisis situation in many parts of Germany. While many people have been hit hard, with our entire neighborhood having been flooded to some degree, me and my family are safe! Our basement had a few cm of water, but nothing too serious. The workshop is dry and unharmed. I'm also not home at the moment. We have left for our camper trip yesterday. I'm currently near the city of Bad Dürkheim, starting my long-expected vacation. In the following days, we will continue our road trip, through Bavaria, Austria and Slovenia.

[@techtastisch7569]

Small improvement i would do to those tools: makita batteries have a third pin. That is an enable/disable pin the battery uses to tell the machine weather or not it is safe to operate. When it is "high" (18v or there about) it is ready, when not it is empty, overheated or something else is wrong. Some Relais could make good use of that😉

[@dennisp.2147]

Glad you are safe! Bad Durkheim is awesome! I went to the wine festival there in 1997.

[@SerbanCMusca-ut8ny]

Stay safe, have an excellent trip and enjoy your holidays! Eager as always to watch the next vidjayo you'll post. Take care.

[@johngassmann9581]

Glad to hear you are safe.

[@SalvoMorina]

Enjoy your trip and take care...

[@AJRestoration]

This is also nice if you have an off-grid workshop, and charges the batteries with solar.

[@Dudleymiddleton]

Yes - big angle grinders now have a soft start - the old black and decker 9 inchers used to kick like a mule!

[@horacegentleman3296]

You gotta brace for it like a shotgun.

[@dj1NM3]

9" angle grinders were banned from worksite use in NSW (Australia), because too many workers were getting badly injured by them kicking back on start-up.

[@bjoe385]

@@dj1NM3 What we’re the people who owned them supposed to do, put a propeller on it and use it as a fan?

[@peterzingler6221]

@@bjoe385 well rotating mass has force.. And angle grinders kick like a beast if you don't know that you have the disk in your leg or chest faster then you can look

[@NenadKralj]

@@horacegentleman3296 good old times 😎 I remembre that 🤣

[@funkysod]

Been using two of my old ( 15 yrs +) for 2 years with cheap 18 v li-ion batteries for another brand. These are 12 v machines but has been running great, still running. No regulators or anything. Just straight up. The trick is to choose a cheap brand of batteries with all control circuitry in each battery. Meaning that the battery itself protects against high temp and such. The tools has only hight temp shut off. This combination works well. 3d print my adapters, the oldest one i have is made out of wood. Thanks for sharing, awesome!

[@DanDanRobotMan]

Stacking batteries for higher voltages can damage the BMS (battery management system). The BMS will disconnect the load if the battery is over discharged or over current (or over temperature). That disconnect MOSFET was designed for the 20VDC that the pack produces. When you stack batteries for higher voltages, the first pack to disconnect is exposed to 120VDC and that is highly likely to fry the disconnect. Things may appear to work for a while, but the first time a battery hits over current or low state of charge can cause one or more packs to be permanently damaged. Fire is possible when this happens.

[@rob3125]

I 100% agree with you.

[@daverei1211]

Moral of the story, don’t let your house to a DIY KZbinr - otherwise all of the external bricks will have holes…… LOL

[@TerryLawrence001]

Irony - When you slip and cut electrical conduit and wiring with a cordless grinder. :D

[@BrucesWorldofStuff]

Glad to see he has a neighbor with a brick wall... :-P LLAP

[@daverei1211]

@@TerryLawrence001 I shuddered at that too.

[@RuthlessMojo]

Intuitive improvisation is a hallmark of genius. Being able to troubleshoot and problem solve whilst improvising and implementing a solution. You Sir, are a genius.

[@DD-DD-DD]

"Gear Show" channel has some fun AC to battery conversions, including rewinding the copper coils in some cases, to match the voltage/RPM.

[@cooperberrysmith7701]

he goes very in depth, recommended channel

[@IamDerick]

The adapters really do increase the value/versatility of any of the popular batteries. I have extended the life of my Dewalt 18vdc tools by converting them to the new 20 volt max. I also converted my hedge trimmer from the expensive 40v battery by using two 20 volt max batteries in series. Thanks for going over the circuitry. It is nice to be able to provide a dc voltage without dragging out my HP power supplies when doing automotive component testing. Cheers and thank you for the education for which I am glad to chip in on your patreon.

[@rodneyhuebner1559]

I noticed your grinder slowed down under load, I would use the op amps in the TL494 in a feedback loop to compensate for the higher loads by varying the PWM rate to keep speed constant.

[@osamahnajjar2824]

Greatings, At that moment the grinder is running at 100% duty so i don't any modulation would help.

[@ThePostApocalypticInventor]

@@osamahnajjar2824 That is correct. It is already running at 100% in that instance

[@nicolaswannen1743]

With that setup you could even continue your work after having cut into your power line ! Smart

[@kampfnudel22]

I have to say, that converted big angle grinder looks a lot more comfortable to use than a 2x18V battery driven grinder

[@5084204]

And probably, it will work longer. My LXT 18V single battery grinder is barely able to make ONE cut of the flatbar 100x10 using 1mm thick 115 disc. I am dissapointed.

[@kampfnudel22]

@@5084204 What kind of battery? I can grind and cut for 15-20min with one 5Ah battery

[@5084204]

@@kampfnudel22 genuine Makita 3Ah

[@wearsjorge55]

Makita have a backpack that can fit your battery tools. If I knew about it before I bought my kit it would have been my go to

[@zanpekosak2383]

@@5084204 3Ah is not enough for a grinder. I have a cheapo brand and get about 10min of light work on a 4Ah battery. The 2.5Ah is dead almost immediatly. Get a 6Ah makita battery and the grinder should run much longer. Also let the disk do the cutting, dont push it. Battery grinders hate force.

[@RazorSkinned86]

There is a brand that has this collection of cordless tools for "makers" that uses a single high capacity lithium ion battery pack that all the tools in the collection then connect to via a nice braided sleeve cable. All the tools in the collection are small and brushless. I've thought about converting older tools like the ones in this video to tether to an external high capacity lithium-ion power source.

[@albom.2744]

which brand?

[@patricelebrasseur5649]

@@albom.2744 I think it's proxxon

[@ROTEsimplemachines]

Yes, if this had a low danger of damaging my corded tools (including some lower wattage bench tools) and I had a clear understanding of duty cycle in order to protect the Makita batteries, I'd pay $599 for this solution. I've been looking at camping-style battery generators and most of them look like they are destined for the junk heap right out-of-the-box

[@Trydntru]

Your videos are always so well thought out and presented in a manner that makes it easy to understand.

[@mrsillywalk]

The old boys when using low power generators would run the blade along the ground as they started the machine.

[@jimsvideos7201]

15:15 This new ghostbusters movie looks a bit rough but off to a good start 😂

[@KeritechElectronics]

Cool hack and collection of tools. It's good to standarize on one type of batteries, and adjust non-matching tools. I revived a Bosch PSR14,4 drill by getting rid of battery altogether and adding a 12VDC power cord that I can use with SLA batteries, power supplies etc.

[@RickRose]

Your explanations of the circuits you build always go straight over my head, but I often watch them anyway hoping lights will go off in my head and that I will start figuring out just what the heck you're talking about. Thanks as always for sharing.

[@mcorrade]

Man-0-man I'm always so thrilled when I see that you've uploaded a new video. There are only a few youtubers that I really get excited for and your at the top of that list. I feel the same way about tools and have repaired and even built my of my tools. I hate that we're in a "throw away" society but, their loss is our gain!!!!

[@pauln2661]

Oh! Thanks for showing us the battery adapter! This fills a need I have for a camp trailer.

[@ALAPINO]

I've mentioned this before on your last conversion: Make sure your low-voltage cut-off for any device using the Makita packs is very conservative with a higher rebound voltage threshold. The Makita battery packs will brick themselves if they hit overdischarge 3 times.

[@thorflot]

This is very good to know. Just recently found out the Makita batteries don't have built in under-voltage protection, while working on a e-scooter project using Makita-cells. Would you happen to have any sources for where about cut-off should be? Currently I am using 14.3V for cut-off for 18V packs.

[@ALAPINO]

@@thorflot That's odd. Do you have older LXT Makita batteries? I cannot recall, sorry. 14.3 V seems okay, if one assumes 14.3 V / 5 cells = 2.86 V per cell. It would all depend on your cell type, cell arrangement, overall Ah capacity, pack age. Last I did a conversion I ran the battery down with a low amperage draw tool, slowly, to see where the battery meter showed spent measured the voltage at that point. Disconnected, waited 15-20 minutes and then measured what the voltage was after the rebound. Bear in mind, those were older (but still Star) 5.0 Ah battery packs. The process didn't seem to differ between, no-brand, Milwaukee, and Makita in my experience. Milwaukee packs can easily be recovered when the charger refuses it in an under voltage condition. Makita and Dyson packs seem to burn their controllers and, by the reports of others are not recoverable on the IC level. Good luck!

[@thorflot]

@@ALAPINO not really. Bought a combo-set black friday in 2019. Thought for a long time the batteries had this built in, but was told that this is not the case, that the under-voltage cut off is in the tool, to keep down the battery cost? Of course, I would love to be wrong here!

[@ALAPINO]

@@thorflot I simply can't recall if Makita had them built-in because I always utilized an low-voltage cut-off module in my fun-time projects. I think your information is correct... come to think of it I don't think anyone has a low-voltage cut-off built into the pack. I would certainly suggest you go with one. I've standardized with Milwaukee packs at home, though I miss Makita for their wood working tools. They are far more physically and electronically robust in my experience.

[@ALAPINO]

@@thorflot I found some old notes: BL1830 3.0 Ah, Makita. Ran, no work, on a Makita angle grinder until tool voltage cutoff. 12.8 V - 13.0 V. I averaged it out over a handful of runs to 13.0 V. So your ~14 V is very conservative. Accounting for rebound voltage, I wrote in 13.6 V, 2.72 V x 5.

[@tenjetu]

Great stuff! For emergency opening of forest gates I recommend a manual 60mm pipe cutter ;) No juice needed, can be bought for 40 and should cut many pipes almost silently.

[@stevenhoglund9922]

Got Real nervous right around 15:16 Then you started to take it up a notch and get closer to that Conduit. Stay Safe TPAI, We need you more than ever these days,

[@groundskeeper5292]

I like how you come up with an interesting scenario for a use for these tools!

[@ericjames5163]

I have been running my old 9.6 makita stick pack drills strait from 18 volt modern makita lithium without issue. I expected smoke or overspeed, but it has been going great so far.

[@wearsjorge55]

Those old makita drills just don't die! If a compact variable speed switch was easy to build for it then they would be the bees knees as they say

[@ericjames5163]

@@wearsjorge55 I must have lucked out because because two that I use are variable speed. They were the newer ones toward the end of the 9.6 stick pack time. It was good the motors have overload protection and they take a break before they start smoking. I really like that the chuck shafts bearings are mounted in the drill body instead of an insert. Sometimes I really need there to be no wobble between the chuck and the handle and the conversion is great for that.

[@wearsjorge55]

@@ericjames5163 mate that's excellent. I didn't know the newer models had variable speed I'll have to keep an eye out for some

[@MrDuranis]

Could you imagine if his neighbour ever asks if he has a drill they could borrow. "Well I have one or two...."

[@CaedmonOS]

Or three or four or five or six

[@JohnDoe-pv2iu]

Yeah, I love his work and videos but I have wondered why he's always getting ANOTHER cordless drill! 🤣🤣🤣

[@sherannaidoo2712]

Cordless tools are the new landfill along with cellular phones.

[@KnightMirkoYo]

@@JohnDoe-pv2iu he could probably make a profitable shop selling those converted old drills.

[@Martin-pb7ts]

I think he is collecting cordless drills in multiples of 6V.

[@802Garage]

Awesome stuff as always. Glad you are safe from the flooding. So sad how many people are facing those terrible conditions.

[@henrymach]

There's something strange In the neighbourhood Who're you gonna call? Angle Grinders!

[@Jimfowler82]

We got one!

[@brianpercival1829]

Good to see that you and family are safe. Take care and stay dry.

[@iQuincyboy]

Amazing design, both electrically and from the UX standpoint. Also - bags are great. Please keep this great work up!

[@SynKronos]

I built a PSU to power old battery tools in my workshop. Ok its cables again but it's a simple solution. I then have a 12volt drill that lives on my mobile 80 watt solar array that runs from the car battery that is being charged. I can also use the starter car battery that's on my 5Kv generator. Or attach to a lithium portable power bank. Loads of options bro. Glad to hear you are well. :)

[@squirlboy250]

I love this kind of content. I definitely want to see more of this. Learning DIY electronics is always a good thing to have stashed in the back of your mind for uncertain times. Or just to know how to fix broke down things that you can find really cheep or free.

[@aryluiz]

awesome video, thank you, with all those conversion from those old batteries we need a video on how to make a spot weld for lithium batteries !!

[@nopenope134]

OK. Now tell me the German word for that backpack device you made! Needs to have at least 50 letters, and a combination of 7 compounded words.

[@takix2007]

Rücksackbatteriebetriebenkraftgerät would be a good start.

[@NCCElroon]

Lithium-Ionen-Sekundärbatterierucksack

[@chrishuhn5065]

Easy.. it's the MAHLEVT! The "Mehrfachakkumulatorhochleistungsenergieversorgungstornister" (-:

[@takix2007]

@@chrishuhn5065 I yield, MAHLEVT (which sounds like a Hungarian train company) is indeed better than my feeble RBKG (which sounds like a Russian-designed nuclear reactor).

[@nopenope134]

@@chrishuhn5065 EXCELLENT!

[@321tryagain]

This was very helpful. I have been trying (and struggling) to make a generic cordless vacuum motor for some time, since the motherboard of mine has failed. However, the battery has an anti-surge and I failed to build a soft-start with a RC circuit switching on a mosfet (destroyed the mosfet somehow).

[@SuperUltimateLP]

The flyback voltage of some ac motors can by really really high. Try adding a flyback diode if you don't have one already.

[@thomasdoherty6876]

@@SuperUltimateLP i had a mains blower tgat would trip electric when it was switched off, i wonder if thats what it was?

[@SuperUltimateLP]

@@thomasdoherty6876 a mains powered motor usually doesn't have a permanent magnet in them, this means that it can't really act as a generator. I don't think that any significant voltage would be fed back by it sorry.

[@thomasdoherty6876]

@@SuperUltimateLP i wonder why it did it then very strange was only a little universal motor

[@collingeiger7321]

I greatly look forward to the bags and patches becoming available :D

[@wearsjorge55]

I always find myself returning to your vids. They're incredibly helpful

[@pauln2661]

This battery pack is a dream come true for AM/FM/Shortwave radio enthusists!

[@Lokalaskurar]

Your schematic drawings are so good! I need this function here, whoop suddenly a digestable number of components appear. Good approach.

[@iantherealg]

I have that exact grinder I found at the scrapyard (it had a bad trigger). I've ALWAYS wants to make it a cordless grinder so I can be more selective about what I find at the scrapyard and pay for by weight. Thanks so much for this video 😍

[@Horusaem]

omg rain/deszczyk camo.... warsaw pack special ... idk what were they thinking while developing this camo.... a blast from the past for sure ;)

[@argumentfoireux1660]

With your military jumpsuit and your battery backpack, you really look like the Post Apo Inventor. You now need a helmet with commutable safety or welding glasses along with ear protection.

[@FixTechStuff]

I've done a video on a similar thing as the 12V USB charger in your video, but with dewalt, since then they have made dewalt sockets which are really handy too. Those USB chargers are the best battery bank by far, everyone with Li-Ion drills should own one.

[@RRaucina]

Get yourself a BIG truck and head for the flood areas! Once in a lifetime opportunity to save all the great stuff being thrown out.

[@SacoSilva]

15:23 anxiety level: over 9000

[@nonsuch]

If you find an old Scroll Saw, it has a nice variable circuit you can use on just about any power tool motor. You can find them used very cheap as well. Scroll Saws are one of those tools people buy but, rarely use. 👍

[@rolls_8798]

GreatScott! has some great videos on switch mode power supplies and buck/boost convertors which encompass almost all the same features of speed controllers

[@mlefe09]

I've loved all the info you put in here, good job!

[@myutube6422]

Glad that you & your family are safe!!

[@davidabbott9347]

We have 110v tool's for site work in Britain and as most are turning to cordless these tools can be had quite cheap.I would also like to point out the Aldi supermarket has a range of tools were the battery provides both 20 and 40 volts so only three would be needed for 120v or six for 240v , the charger and batteries are very reasonable.one last have you thought of using the circuitry from an inverter without the coils,ac current pure sign wave ??

[@iamjohnmc]

The same goes for job sites in Ireland, which may be more accessible from Germany these days.

[@Roamor1]

Really enjoy your efforts for a less wasteful society!

[@radiantxpdd]

Very inspiring, as usual. Starting to feel I need to look into building some power MOSFET circuits! Thanks for the IC recommendations.

[@TheDistur]

That's pretty clever. I've made adapters to use battery tools on a car battery but they're obviously slower than intended.

[@lucidmoses]

Heat is the enemy of lithium batteries longevity. May want to rework your backpack with that in mind.

[@vennic]

Throw a couple pc fans in the sides, that would look sweet

[@romed9763]

2 words : dry ice

[@tomk3732]

Most corded stuff in Canada can be had for a song. Usually Bosch drills as presented cost $5 or less used - like 3 EURO. For a lot of battery stuff it can also be had for a song if without a battery. For broken batteries it is a good idea to simply gut them and get new lithium power cells.

[@scroungasworkshop4663]

Glad to hear you’re ok. One suggestion would be to use super glue instead of polymer to get a neater finish. Cheers Stuart 🇦🇺

[@sarahmayer8539]

14:50 120V in a backpack, I would probably get so nervous that my sweaty palms would cause an electrical short lmao Great work, as always!

[@peterzingler6221]

It's DC. No worries there. Direct current can be touched up to 170v without feeling much. 60v DC is considered completely save to touch..

[@teslakovalaborator]

@@peterzingler6221 But also DC has a big disadvantage of blood electrolysis. PS: You tell me 170V is "without feeling much" ? :D I once did that with both hands and it zapped me good. Still a way better than touching 230V just capacitively coupled touching only live wire.

[@EngineeringNibbles]

@@peterzingler6221 I've definitely felt 90v DC quite strongly, I'd never feel comfortable touching 120+vdc

[@peterzingler6221]

@@EngineeringNibbles hardly depends on skin moistness and of course don't touch with both hands... But compared to a shock of the same ac voltage it's nothing

[@peterzingler6221]

@@teslakovalaborator funny enough I have so dry skin I don't feel much up yes. I can feel it but it won't hurt. Talking about touching with 2 fingers not 2 hands

[@danny117hd]

I recently bought nine Ryobi Batteries for parts from ebay. Eight work after simple repair consisting of charging the individual 18650 cells.

[@TheBarry1394]

im sorry but as creative and ingeinous as this is, as soon as I saw you with the battery pack backpack the ghostbusters song played on my head haha

[@jackdedert2945]

Recently I had to do some brake repair on my car. Looking at the stupid screw jack, and remembering the times I laboriously cranked the car up and down when changing a flat, I hit on an idea. I chucked the handle of the jack into my 20 volt Porter Cable drill, thinking it would at least get the jack up to the point where I could finish the job by hand. To my surprise, the drill had little difficulty raising the car to working height, and letting it down again. The handle didn't fit very well into the chuck, as it had a bend and a flat on the end for prying off the wheel cover, but was good enough to get the car off the ground with some finagling. So...my idea: take one of the many old NiCad drills I have around, fit it with a cord to plug into a cigarette lighter socket and store it with the jack. I'll obtain, modify or fabricate a more suitable 'bit' to fit into the jack to eliminate the wobbling I experienced using the original. Voila'! An electric jack for nearly zero cost. If the it blows the lighter fuse, I'll equip it with suitable clips and connect it directly to the vehicle battery.

[@craned]

I was thinking this was going to be a pretty standard video where you were showing how you converted the tools to Makita batteries. You REALLY got my attention when you wired those batteries in series, lol.

[@plunder1956]

In England most building-site power is 110V AC as a safety measure. So hear 110V tools are easily available.

[@Conservator.]

I’m just wondering why use 110V as that can still kill you? Does anyone know?

[@markavis7232]

@@Conservator. A UK site transformer has a centre-tapped secondary winding, and the tap is used like an 'earth' to the metal case of your (eg) cement mixer. So the supply is +- 55v, and you only get hit with 110v if you get across the two lines.

[@TenSapphires]

great battery pack for electric bicycle or quadcycle! Love it!

[@martijnpc]

Again another great video with many saved tools. Those Makita battery adapters are really cool! I should get some so I can use my batteries for other tings in case of an emergency.

[@StrPtrn]

I have the same model cordless bosch but from 2005, believe it or not, but there is still some life in the NiCad batteries! Planning to convert to Li once they give up though, saving this for future reference!

[@unbekannternutzer8506]

Just Putting multiple Batteries in Series can be dangerous. You might Need reversed blockingdiodes across each Batteries Terminals. If one battery is Low in Charge or aged there is the possibility that it Sees a negative voltage (under high loads of the Series configuration). which is Bad For the Cells, but even worse for the electronics.

[@DStageGarage]

Nice work mate! Just one comment - at 18:20 you say "voltage divider" - those two resistors are not forming a voltage divider. The 10k is limiting input current for IR2121 and I think it is actually completely unnecessary as IR2121 has a logic gate at the input and input current is only few uA anyway. The 1k is part of the inverting output of TL494 with open collector - I'd say you can easily turn it up to 10k or even more, this way you will get 10 times lower static current on that output - instead of ~18mA at highest duty cycle it will be ~1.8mA. I guess it's always a good thing to limit current consumption when your circuits runs on batteries, right ;-) Besides it will have no impact on the functionality. BTW, you put 12V on your schematic while with one battery you're getting 18V in your case and with full charge probably a little over 20V which will be slightly above recommended operation voltage of IR2121 but I think it should still be fine since it is still well below the absolute maximum of 25V. I've also added a comment somewhere below that changing the gate resistor to a higher value for example 100R could reduce EM noise with a cost of slight heat production increase. Side note - I was once planning to use battery powered angle grinder to run my Sinclair C5 ;-) I was planning to use 120-160V with parts of Toyota Prius battery pack and modifying the motor a bit. Since those are usually series motors it means they have stator winding in series with the commutator of the rotor. One can disconnect them and control both individually with lower voltage than nominal 230V (or 120 in your case) and also have a wider control over the RMPs and torque since you can change the excitation individually.

[@riz94107]

I feel for any radios in the general vicinity of that first PWM circuit... Sounds quite RF-noisy

[@DStageGarage]

I'd suggest changing the 12R resistor on MOSFET gate to something like 100R, it will make it generate a bit more heat but should limit the frequency range of the noise ;-)

[@Projectblackkjack]

Oh no its grinder man lol, those bags look awesome, great idea!

[@leehenry1165]

I always enjoy your content and learn so much from your explanation of electronic circuitry.

[@amaanqureshi1286]

i love this thank yuou for keeping my love of electronics alive

[@richardbrobeck2384]

Another great video and I have 2 great drills to convert to Lithium My older Milwaukee 12 volt made in Germany and My Makita 1/2 cordless drill and 1/4 impact driver both of them are 14.4 NiMH .

[@josephkrug8579]

Instead of running power tools....you could also power your laptop with the battery pack. :) Fun project.

[@brucegarrett7232]

You can buy battery adapters for any battery to fit any cordless tool.I E Bosch to Millwalkey, Porter Cable to Makita, ni-cad batteries to l-ion.

[@mx96288]

Hi Gerolf, can you confirm wether Makita 18v lxt batteries have low voltage cutoff of the DC terminals at the battery level or is there only communication happening via the smaller pin connectors to the actual tool to refuse any further power draw?

[@MyProjectBoxChannel]

Those battery adapters are brilliant! So many possibilities 🙂

[@catatthedesert142]

damn, i wonder how much that block of wood where you tested those would be worth currently.

[@jameszietsman5518]

Hi Gerolf, The tools you repair and use is terrific. If only men like, Pappa Amu & Max Agorov the Russian of St Petersburg could train some cosmopolitan, troubled young men to give them purpose, education & toleration what a better world we'll have. Best if Unicef could pay you folk and their countries sponsor them. Now that would beautiful. Tx JZ

[@excitedbox5705]

you can use a 555 timer for soft start as well and it is much simpler.

[@McTroyd]

One-shot timer?

[@PawelGonera]

I tried to make 4S LiIon packet for the 14.4 drill but never thought to power it from 18V. It is tempting, as I have few Makita powered tools. Worth trying

[@jimsvideos7201]

Also, there's TPAI for grinder hacks, and at some point in the future there might just be AI TP for Smart Asses™.

[@alankohn6709]

That reminds me one day I was passing a parking lot one of those annoying pay lots that have popped up all over the place this place was notorious for clamping vehicles at the drop of a hat and charging silly money to get the clamp off. I passed a tradies ute (Tradie is Aussie slang for tradesman and Ute is short for utility what you'd call a pick up) and noticed it had been clamped when I came back later the clamp had been cut into several pieces and there was a sign saying I own a cordless angle grinder

[@stepansavelyonok5532]

This backpack needs wire with festool-like connector and tools converted to the standart.

[@SparksNZeros]

NGL could you make an option for one of the bags with the wooden box support in it? I adore the Post-Apocalyptic style of that and it'd be perfect to keep my soldering gear in for travelling between workshops :D

[@MarkMcCluney]

Ah! I've been waiting for this one! Cheers Gerölf. And you inspired me - I've just been converting a few oldies to corded. Thanks mate.

[@twocvbloke]

And of course, double the battery count to run 220-240v tools, just watch out for the electric pixies biting you though... :P

[@SerbanCMusca-ut8ny]

Yep. Not sure I would like to carry a 220 V pack on my back in the woods, especially if it gets rainy :p

[@mbraun777]

Would love to see you convert battery powered tool to AC voltage for household power.

[@vennic]

I was just searching for a black and decker adaptor combo so I could use 20v batteries in series to run a 40v leaf blower. If I had a 3D printer, I would print a nice caddy for it to attach nicely to the tool

[@MrPhatNOB]

Awesome content as always! Would be awesome if you could make a video on making a PWM controller for a treadmill motor from scratch. Like a 180v dc one. Then use the motor to power a machine.

[@Alchemetica]

Thanks for the video, they are always appreciated. I have two Makita 12V drills I think at least one is made in Japan. The 3rd party cheap replacement batteries are rubbish and the so called replacement Makita Batteries sell in Oz for around AU$90 but none of the photos show Makita printed on them - probably a scam. While I was aware of the 18v Makita adaptors, from one of your previous videos, it was not until seeing this video and the 12v adaptor that sparked my brain into action. Now I have the seed of a plan. I totally agree with your philosophy of Repurposing, reusing and repairing old tools. Good for the earth and gives one a good feeling. Wünsche dir sicheres Reisen. (The best I could come up with in Google Translate, so the Grammar is probably incorrect) ☀

[@jpsimon206]

I believe that you have inadvertently invented the ultimate bike thief kit

[@leedale5393]

Am very impressed by what you do and would be amazed I am sure if I had a clue about electronics.keep the good work up as they say you could teach a chimp to play the piano in time.

[@mastermaker666]

Small car/mc batteries(+converter for AC tools or just a long cord and a voltage regulator for battery tools) and a moving-cart/hand-truck would make for a cheaper option that would provide enough amps for some duration of work(which is often the case with angle grinders, masonry/hammer drills and such) and quite a bit of mobility(will be doing something similar with a ready-welder when I get around to building an aluminium boat)

[@DrJALAGHARI]

Great battery pack video with full detailed information.

[@murraystrand]

Great video! Thanks! I'm currently working on a Yamaha three Wheeler conversion, from gas to electric. I have the batteries and motor, but having problems with the motor controller circuitry. I've tried a couple of motor controllers from Amazon, but they have a built-in soft start or time delay so they don't increase the motor voltage rapidly enough. This video is helpful for me to design my own circuit if I need to. An idea I had though, that maybe you can provide some input on, is using a drill trigger speed control on my handlebar as a first stage to control the input to the actual motor controller. It would operate like a thumb controlled throttle on a gas powered quad. That drill speed control can't handle a lot of current, but it could be used to control the input to the motor controller circuit board. What are your thoughts on how to incorporate this into the MOSFET output motor controller?

[@musFuzZ]

Looking to build a ebike with makita batteries. Also have a system that you can add batteries together, and add a inverter, as a power pack/ hub charger combo. Dewalt has something like this.

[@badrinair]

wonderful videos. I am addicted to watching them now. I have always wondered why do you have a large roll up display screen on your exterior wall ?

[@TheJohnRowley]

Thank you for making the bee caves in the wall 🙂

[@stevekreitler9349]

I would seriously be interested in buying a bunch of those bags wholesale, if prices and shipping (to Texas) can be had at a reasonable rate. They'd make a great addition to my gun show tables and the website I'm planning. Patches would be good to have, also- I'd be willing to bet that a lot of my customers will love your channel!

[@MannoMax]

Die Idee mit ner 230er Flex mit Akku gefällt mir richtig gut, aber ich hab leider schon ne alte Dolmar Motorflex 😅