You gave me an idea of charging a drill I found using a 12v RC car charger. Worked a charm.

This has to be my favourite Video this year - Very well explained and presented - Great Job!

Great video! Thanks! When the battery reaches the same voltage as the power supply, the current will stop flowing. That is, current drops to zero amps. No voltage differential. You can prove this by turning your power supply up by about another tenth of a volt and current will start flowing again. As you mentioned, don't do this for too long to avoid battery damage or worse.

I had one of those black and decker electric screwdrivers, it lasted me 6 years of abuse. I was impressed

I got inspired by your video to boost my old drill batteries that haven't worked in years and i just got them working today! Thanks very much for your video!

really informative and perfect timing as I've just bid and won a drill without charger. cheers

Coming from an Amateur Radio operator, your charging video is well considered. We use buck and boost chargers all the time for the various rechargeable batteries we use daily. Several charger designs use this method. So I can say to your detracters, Very Well Done !!!

Good work> You explained it slowly and informatively. But I got lost in the middle as I am a plug-n-play guy. The ease of use that comes with the Chinese charger would be my choice to get the job done without having to go through all the learning and buying of other products. Thanks

In Sydney my oldest brother used to buy MAKTEC! Identical to makita! Top job.

I can't believe it that's amazing WOW. And I thaught I was the only one that had a hyper tough drill 😂😂😂

Thanks for the hints and helpful advice, which btw, worked for me.

Yup so this is the last video I watched! I am way behind!!! Lol I’ll definitely be going through the tool haul videos! Keep up the great work!! 🤜🤛

Thank you so much your video helped out a lot I needed to find out what NTC meant and I found out in your video and stayed tuned for more informative things so i appreciate your video and all your help bless you dude peace

what a great video lesson on electroincs on "power tools batteries" It's like a refresher for me and when you get older its really nice to have this kind of video to watch. thank you sir for your great video. I really enjoyed it very much. aloha from kauai ;)

Thank's for the charging info.

Good explanation and video. Nice filming. Keep them coming!

On the Makita pack you will see a yellow connector which connects to the standard Makita charger as well as the +ve and -ve terminals you used ... This way the voltage of each cell is monitored by the charger and kept within correct range ... If you were to charge by your method REPEADEDLY the cells will drift out of alignment and damage could result . Other companies appear to have this balancing circuit within each pack and not in the charger , so only have two terminals to connect to charger.

You lost me at pre cut wood. That stuff don’t grow around here. 😆 Great vid thanx for the tip!

Thanks for your great explanation. I'm a novice at electronics and 78 years old so I have to go very slow and you made it very understandable.

Don’t know enough about electricity to charge my batteries this way. Screw that I’d rather just get the stupid charger. Really cool video though it’s crazy how much science I take for granted every day

Very, very good! Thanks!

You are great thank you so much for sharing your knowledge you have been teaching me so much thank you thank you

Very good video, iI will have to try that thanks

I use an iCharger 208B as a charger. It will charge dang near anything. I even charge my 48 volt ebike battery by splitting my pack and charging in parallel and running in series using a 4 pole double throw switch....... It also allows lowering the charge voltage to prolong the life of the batteries and it displays Amp Hours used in charging so I can figure out AH per mile on my bike. edit: And other stuff as well such battery degradation..... It cost some bucks but I have used it a lot for over 6 years with no problems.

I use a bench power supply. You can set the voltage and current limit. My power supply supply is 0 to 50 volts dc and only 1.5 amp max. . I usually set the current between 650 ma to 1 amp. I have been charging li ion batteries for years this way. By the way my power supply is from the 1970's with an analog meter. Buy a cheap Chinese model power supply with at least 0-30 volts and 3 amp capacity. Well worth it. Thanks for the video, not bad.

there is actually a bit more going on inside these batteries that is good to know, in most cases the packs have a built in BMS and balancing circuit hence the separate charge pin, there is a higher voltage on the charger to make sure the charging is complete and quicker and when the pack is near it´s full charge the balancing is done, if the cells are drifting in voltage it evens them out and if you charge these packs on the output pins you won´t get proper balancing and it can lead to damage but sure this is a bit different between brands and how it is made. some chargers and batteries has a whole bunch of pins and can be separate balancing or temperature monitoring whichever can be built into the battery or the charger itself. so in conclusion the best option is to use a real charger made for the battery or if you do it yourself figure out how the battery bms is made to work and use the correct charging input for it. usually the battery has built in over and under voltage protection, it gonna turn off if too much discharged and it should also cut charging if the voltage goes too high, however if you charge on these outputs it may not be able to shut down over charge or unbalanced cells causing a fire hazard or damage to your equipment. so basically if you are not 100% sure what you are doing then prefer a dedicated charger made for this battery :)

Thank you sir for the education

FYI - How to charge info Starts @ 8:00.

All "well made" Lithium Drill batteries have a 4-6s BMS in them that balance charge each 18650. The 14-21v (depending on the pack) gets divided to each battery and charge at 4.2v. The BMS is also has overcharge and undercharge protection. If you open up the casing you can charge each 18650 using any charger that has balance leads as the batteries are connected in series. The last battery in this video. That should be a balance lead connecter (that yellow connector in the middle). Using that connector you can check each batteries voltage on its own.

Good video I'm goin try that

Wow how simple.and easy.

Would you please tell me what kind of multi meters those black and blue ones are that you are using in this video and where did you get them? Thanks! And thanks for the video. Charging batteries is a subject I'm becoming interested in lately. Especially drill / tool batteries. 👍

Wow, ! thank you for simplifying this task. I live in Hawaii and no one ships lithium batteries. That is they won't fly them. So making due is neccessary. Im an electrician with plenty of motor controls under my belt. But thanks to you i don't need to do more research. I make things safely for safety.. so this will totally work. ❤ I've got a Ridgid 12 volts that are obsolete discontinued and no one will send me the charger or the battery how to have Milwaukee 12 volt . I know it's the same three cells if I can get the Milwaukee to charge the Ridgid I will make a video

Interesting video, a bit over my head. I'm looking to charge and 18v battery when I don't have an 18v charger. I have a 12v charger for a Milwaukee drill, a trickle charger for automotive use, and a bigger car charger. What wire goes where?

I always wondered wondered what ever became of Ferris Bueller. Hows Csmeron doing?

E-tool or EV battery pack are build indide with multipile groups. Each group is charged independantly by way of floating charging and monitoring, to limit any group over charge and over heat. If any group is over charged, it could generate over heat, causing damage or fire.

First I will need a magic tutorial to understand this science.

Yea ok but just take a look at the Mikita battery. It has a yellow connector too for the BMS on the charger. Charging without the right charger will eventually kill the battery pack because one cell will eventually reverse charge.

I've been using my RC car battery charger. It has settings for every type of battery (even lead acid) and an alligator clip attachment. I stick paper clips in the battery then attach the charger.

Test the Milwaukee high output batteries, I’m curious how they compare with the other ones, if they are worth shelling out a couple benjies for

Trying to charge an 8v max dewalt battery n dont know what is what on that battery thatd be cool to see an update of the batteries if you have any new designs even to show off how youre doing this cause this pack is a different setup to have work and am curious what you think nice vid as well easy to learn

Great video, thanks so much. I have a small Dremel tool that isn't made anymore, and the charger stopped working. It's a Dremel Model 1100 Stylus. It's 7.2V Do you have any ideas how I can charge the unit? Actually, I only used it a handful of times from when I purchased it way back, so the batteries really only got discharged and charged maybe 3 times total in its lifetime. So I'd really like to be able to recharge it and use it.

thank you sir

Question. In theory if you have a bust charger and have another charger of exact charging spec would it not be possible to use the original top shell and jump the wires to the working base unit. That way the safteys are still In place

Good Video!!!

Great video Why my ryobi 18v charger reads “0” when I test with multimeter but it still charging

I put a 5s balance lead on 20v harbor freight pack and I use a 20 dollar rc charger to charge I use the balance charge function works like a charm and a lipo fire bag

If I have the right battery chargers but not the cord that goes to them what kind of cord can I use? I have 3 different cords that will fit the both chargers the one for the 18v drill master and the 20v hyper tough I have the right batteries for the right chargers but no cord to either charger. The cord I'm about to use if it's safe to use is has an output of 20.0v 450mA The battery is 20v 1.5Ah I don't see the input or output on the charger and all I see on the battery is the 20v 1.5Ah but I don't see any separate input or output information. would it be okay to use the 20v 450mA charge cord with both chargers the 20v Hyper Tough and the 18v drill master? I'm hoping the charger itself will regulate the energy transfer between the battery and the charger as long as the cord has a high enough output but not sure if it could be too high or anything. I also have a 9v 1600 mA output power cord and a 12v 1.5A output power cord but of the 3 I found that fit the chargers the 20v 450mA seems to be the closest.

"Ahhhhhh Shit" is exactly what I'm going to say when I burn down my house trying to do this. I'll just get a charger, thanks for your time.

I find some great deals on tools and gear like this at pawn shops. Have to look around a bit and find things that have been on hand, sitting, for a while and get marked down. Recently got a Dewalt drill/battery/charger for $12, works great. Nice video here, but I'm probably going to stick with chargers.

Just so you know that’s knockoff makita is an impact not a drill :-) (drills have chucks for drill bits). Thanks for the cool video !

At 7:30 you say it must charge through the little lead, but at the end of the video where you start charging, you only connect the big leads?

Wow! indeed it is really complex for my tired brain

I received a drone from a friend with a battery but with no charging hub. And no one sells this old drone's charging hub online. Watched your video and am realizing it's possible to charge my drone battery... but Im realizing I need to know more about how electricity works in order to do it myself. Where did you learn? Where do you recommend that I go to learn?

Does the battery pack have cell balancer electronics embedded ???

Good watch, but you should have shown the "full bars" led lights on the battery at the end. Was waiting expectantly.

Impact gun but all good thanks for the video :)

Does a black and decker charger go with a hyper touch drill. I need to know because all I see is black and decker chargers

Hello, I have a makita drill like yours and the battery run out of energy because of usage. The red indicator shows one blinking led, the drill wont spin and only the illuminating white led works. I charged it last night up to 20.5v with 500ma limit (it is a 3ah one), this morning I disconnected it, measured it shows 20.5, but the red led is still blinking and the drill does not work. How can I fix this? I think it has something to do with those 6 contacts with yellow plastic..

will batery electronic stop the charging itself ?

1) What would happen if I charge a 18v 6Ah Makita battery with a 18v 3A supply or do I have to use a step up board to produce at least 20v? 2) What is the current you recommend for charging this battery? 1 amp 2 amp? Do you know if there are voltage step up boards that can also control current but in a relatively small size like the mini step up /down board you showed in the video? Thanks!

best afforted in this plan so use this battery recovery ideas

I did find this helpful for understanding first hand the currents running through while charging. However, most powertool chargers are 1.3 to 4 amp... my question is would it hurt to bump up to say 3 amp? I also like that you mentioned about the changing balance. Those other diagnostic pins are really important in keeping things even. It can be scary to overload Li-Ion... I've done it once in my early days of experimenting (just from trying a stupid bump revive) Good informative video! Hopefully everyone keeps in mind their safety :D

Warning, I know next to nothing about electronics but I want to. Would it not be possible to make up some short leads that go from a charger and connect onto the battery making sure the connections are the same ( +to+ etc ) or am I showing my ignorance 😊 I did like the vid as you took your time to walk the view through👍👍

I have a worx weedeater and 2 functional 18 volt batteries however my dog ate my charger lol. They don't make the weedeaters any longer I do believe I saw a few of the chargers online used of course the battery is a wa3127 rare wanted to know if i can use a old laptop charger of hell i also have a car charger if i could check or use either? Sorry im a novice at this obviously 🙄

How could I get the universal charger that your using to charge the batterie?

Can you just use the 12v power supply adapter that go in wall

I have a DeWalt 4 battery charger the fast charger as well and the other day I accidentally touched positive to negative on one of the four stations on that charger in it popped it or something not won't charge batteries anymore so I'm wondering if I might can pop it open and get it working again or if it's fried

Could you use an old train transformer to charge anything ?

Will a 2amp battery charger work?

Normally all battery chargers have an output voltage at least 2 volts higher than the battery its charging. Car alternators generally have a 15 volt +- charge to the car battery. Heck alkeline batteries AA for instance arec1.5 volt but brand new good quality batteries are 6 volts +- .01 volt

Were you able to get 6.0A out as well as long run time on that battery (1:07)? I used this battery for my ATG Gold W7150 Kim X (modified from Ingersoll Rand W7150 to 1500 ft pd). This has 6.00 Ah while the IR top battery has only 5.0Ah for $200.00

Great video but how you control the current/amps? I have a 14.4v 2ah Erbauer Battery which I want to charge with, LM2596 DC-DC Adjustable Power. I see that 14.4v can contain 4X3.6 cell batteries. How to be sure exactly and also how to I limit the current, is current not taken, rather than given, if this makes sense. Thanks

@Simple Electronics can i charge two batteries in series with one charger?, thanks new subscriber!

Hello, I tried your technique with my Ryobi 18V Li batteries. The tool stop working when battery is 18V. It has 3 terminals/ contacts marked + and - and third is unmarked (call it Y). The meter reads 18V (fully charged is 20.5) between each of + and - / + and Y. Nothing between - and Y. By your explanation, applying a charge between + and - or between + and Y should work but it does not. I applied 20.4V and the battery did not change. Looking at the original charger (I borrowed). It has 3 terminals corresponding to the battery's 3. When the charger is plugged in with no battery in it, meter reads Y as positive and there is 3V between Y to + or Y to -. Any one has suggestions? Thanks.

Hey boy, is that a Makita battery? I have a battery looks just like the same thing and they say Makita batteries will fit my leaf blower that's called azinava. Will that fit and it's a 18 volt? Please get back in touch with me soon as possible

Nice video - I know this is a little off topic for this video But do you have any suggestions for a cheap method to power a 12volt DC linear actuator ? I would prefer an AC wall socket instead of a 12 volt battery. Was thinking a 12 volt trickle charger (but I think they can be smart and might need to sense a load) or maybe a laptop power supply OR maybe something similar or cheaper than you buck and boost module

Hopefully, these battery packs have internal management systems, to ensure even charge distribution over the cells that make it up. If you are anything like me, you are allergic to the blast radius of angry battery packs.

I lost the charger for my Dayplus impact wrench drill. it has 6000mah and 36f written on it ?

When you gave the all s*** I subbed that's awesome

Next step: build a mating connector for the battery for easier connecting the charger.

Can someone please tell me if I buy the dewalt 996 20v hammer drill with the Flexi volt battery with the 887 impact driver with 20v battery and Flexi cool fast charger would I be able to use the charger in the UK(England). Or would they still charge on a charger I have already.. buying these power tools from the USA is so much cheaper,they advertise the products over here but don't explain the electrical difference between the two countries..

Why not just use the jumper wires from your testing of the charger and other pack to connect this pack to the other charger?

watching this and looked out the window, tumbleweeds rolling past by the bucket load

an ''official'' Makita charger does something additional - it checks the temperature, and regulates the current in behalf of the cell temperature and the possible currents without damaging the cells - it don't charge the battery at all if it's too cold (around - 5 ° C) - it cools down the cells first before charging if they are too hot - it reduces the current if the SOC has reached 80 % My batteries from 2015 are still perfectly fine despite they have been used commercially on construction sites for more than 5 years, always charged in a original Makita charger

Shitily. I love it!!

I buy good tools and good batteries, which is why I use the factory charger. If I was in an apocalypse situation, I'd consider other ways to charge. makita also has a 'charge counter' to know how many times it was charged for warranty reasons. If you battery appears to fail prematurely, my dealer plugs it into a makita gizmo they have and it says exactly how many times it was charged/date of manu. just sayin'.

You can only do this with cheap batteries without the protection circuits of the big brand tools. Get a imax RC charger and you can safely charge any of these " unlocked " batteries of any type any voltage.

I wouldn't be surprised at all if your battery(s) last 5 years charging @250ma..the touted high end 30 min and 1 hr chargers kill more cells than all other causes combined and trades people go through batteries like they were Skittles..ofcourse when shopping pros look for the best battery warranties so can just swap them in for new ones..BTW I have NiCd's that are decades old and still almost as good as new...they have never been fast charged or over charged..

Im more interested in those meters youre using. remember what brand and price?

And also can you send me that leaf blower that you're working on or whatever you're working on? Delete blower I got is 6 volume numbers. I can set it on to blow leaves

Buy your own awesome battery drill (or anything else) here: www.banggood.com/custlink/G3GvQlEm4y and if you want the buck/boost converter I used: www.banggood.com/custlink/KGGYoZzZ1Y

I have a 40v(36v) lithium battery pack for a lawn mower. It has 5 terminals -, S, D, C+, + Do you know what each terminal is? + & - appear to be direct connections to the battery. I'm wondering if C+ is a charge terminal.

So I’ve got a Stanley fat max battery charger that’s made by DeWalt/black and decker. It’s an 18v charger and I have 2.0ah batteries that charge in it. I’ve bought a JCB impact driver that’s 18v and the battery is 18v 2.0ah but it doesn’t come with a charger. The charger is the same price as the driver and battery were. So I’m guessing I could just link the charger for the Stanley to the jcb battery using wires and charge it that way? Should the charger drop off like it would if I was charging the Stanley battery? I have a meter to check voltage as I go.

Can I do it with old laptop charger, 19v

If this is meant to be learned then, I would give a thumbs for it. I think you're giving a commentary rather than showing how it's done!

Why are you checking a battery voltage without putting a load on it? The battery could have a very large internal impedance which would drop most of the voltage across it if a load was attached to the terminals.

Nice theory, but...... I tried that with my Ryobi and the BMS won't let any current in. I'll have to build something to take it.

You should incorporate that circuitry into the existing charger housing rather than playing with clips and wires.

Help. "Can I use a 12.5v charger on a 6v battery for a 6v craftsman 3/8" drill?