Repairing a dead 18 volt NI-MH DeWalt Battery Pack - 763 

Thank you, your disassembly helped me a lot. I hadn't thought of a hammer to the center. I love your chatter and relaxed attitude! You sound danish, or atleast Scandinavian. My parents are from denmark so it is enjoyable to listen to you. I have 2 18V dewalt batteries to fix for my step father they're at 13 & 11V each. With your video i am confident in getting 1 working pack

I am sure that the mechanic will be thrilled with that fix. Great video.

.....I'm only at 9:51 but amazed at your patience. Anyone can gain knowledge and experience but gives me headache just thinking about attempting this. I have three 18v batteries, why I'm here, but they slide in the bottom of the drill instead of that plug in type. Just used one a week ago but last night it would barely turn. Found the double charger and wife had 2 batteries on it. Both were about like the one I had just tried. When inserted into charger the light stays red. Nothing happens. No charge starts. I will have to go get one to see what type it is but thanks for what you have shown here. Wife bought a package deal which has 4 or 5 tools that use same batteries so might be worth new battery but saw video quite a while ago showing how to "trick" the charger into charging. I hate that companies build in the design so it will not charge battery after volts or amps drop to certain point but are perfectly capable of being charged. Greed controls our world. Every aspect. Just how much money and profit is enough? Guess answer would be that to some people there is never enough. I hope their last thot is "where's my money?" The answer is but a breath, a heartbeat away. Great video. I wish you much success and hope this works which I am sure that it will.

The "Crimp Tool (Krimpzange)" is awesome 👍🏻, no chance to fall apart and the wire will never ever get loose again, costly but awesome like all good tools! But it's a once in a lifetime buy, and you can inherit it further 😁👍🏻 Great episode, just in time to look later at my old accu!

Oh my god, thank you so much, man, I didn't find any video in Portuguese teaching repairing this battery, but I will try to repair it now with your video, I'm Brazilian, thank you very much.

lol loved the high speed sanding, it just looked funny :-D Hopefully it worked for him. Yes the low capacity cell would limit the discharge, but the pack was ill anyway lol.

Great video. I am happy with once cell at half the capacity.

FYI - I hate to be the guy that looks for mistakes. 3:22 you're counting the batteries. 1-2-3-4-5-6-7-8-9-10-11 and you skip to 13-14-15 to get to 16 Watching you work on this project make me think I can replace the batteries! I'm going to give it a whirl. Thanks for putting this up.

I didn't know you could test each individual battery with them all hooked together. I have the same battery pack to work on. thank you for the video

Love your DIY vids, right down my alley! A word of caution concerning DeWalt DCA1820 NI-MH to Li-Ion Converter they have components (transistor) that tend to burn out easily (if you use a large drillbit och your circular saw blade get stuck). If you buy them buy 5-6pcs to be safe!

Your video helped me figure out that inserting a couple non-conducting wooden craft (popsicle) sticks into the terminals and rapping against the other end would cause the battery pack to pop free of the housing quite easily. Thanks.

Good Job. at least you mechanic has a back up for his shop.👍 I will bet he will be so happy he will give you one of those little pine tree air fresheners to hang on your rear view mirror 😁😁

When you want to solder fast oxidizing materials you will cover the soldering area with oil and clean it ( the oil is protecting from air and moisture)

Great video Sir. Thank you.

The strips probably are not solid nickel. Most likely they are just nickel plated steel. After the plating is corroded or otherwise damaged, the soldering becomes difficult, if not totally impossible. I would try some slight charging on each low reading cell, maybe 100 mA for 15 seconds and then immediately measure the resulting voltage. The shorted ones are basically lost, but cells that are just low may have a little lower capacity than others in the pack and became low voltage during the last, final attempt to use.

great job thank you sir

Love your videos! I am planing to get my first used server (HP DL360 G6) . If you have any advice let me know I would really appreciate it.

YUR VOICE WARMS MY SOUL

Very good tutorial :) thank you

Do the factory Dewalt batteries have any markings on them that would denote the Brand? I've already rebuilt some battery packs using HF battery packs but they just never really had the "chooch" that the original batteries had. now that its been a couple years i want to just buy SubC batteries in bulk packs and rebuild my battery packs as needed, but i don't want to buy a S brand again i want to buy the brand that Dewalt uses. Thank you

Very good I will fix some I have , maybe have at least 10 bad ones in a box now I know how . Thank you for sharing You're knowledge.

Love the videos. Will you be uploading the Fujitsu server video to youtube?

good video, and good fix. I have a hitachi drill 24v that not (one) battery charge and im go to fix it thanks.

Friend I have a Ryobi battery 12 V it It reads 13 V on my Multi meter but it won’t even turn over a drill could it be in sleep mode

cool, I ahve a couple of 18V dewalt packs from about 2005 that are going bad, I'll probably just combine them into one to avoid buying new packs for now. I can buy a new LiOH drill with two packs for not much more than those replacement clones.

Dear Sir-You need to apply more heat, either by holding the soldering iron to the work or getting a higher wattage one-good cleaning practices though:)! The vintage electric soldering irons with the screw on copper tips work MUCH better, IMHO-John in Texas

there is also a date code inside the battery on the cells because many people but inferior cells in and try to get it replaced under warranty

Great Video

Nice job

Will we see more of the hp storage box soon

What about rebuilding with lithium ion batteries with the same volt requirements

wattage is the only difference then my original rechargeable 18V battery. one is 48 watts the replacement is 75 watts. is this a great problem

That is how to do it, so that's excellent. Set a goal, deal with the drawbacks, overcome, obstacles negotiated, objectives realized/reduced, that's it !!! It's Miller time. Thank you, sir. Hey viewers, not everyone sits around soldering 6 d/wk or replacing batteries for a living. There's some of us that hav to save lives everyday, some hav to take'em, it takes all kinds to make the world go around. Its so much easier to be nice to people, all u hav to do is remember what u were taught as a child: If you do not have anything nice to then shut the f**k up !!!

nice work and nice fluke multimeter 😉

Good job

If one cell went bad, how long till other cells go bad? Replace them all and be done with it.

It would be really interesting if you can update us on how many cycles your mechanic will get out of this. And if the lower capacity cell will be the issue next time.

With your accent I thought you were saying devolved but yeah, it really was devolved wasn't it haha! I'm trying now buddy.

Where do get the new cells?

Love ya video

Very well

can I replace NI-MH with Li Ion?

No explicas como abrir la caja receptora de Bateria....eso debe tener algún truco

kan man købe nye celler og hver ?

Will watch later, just waking up now to my coffee.

Your iMax b6 charger can charge that battery pack

Nice video!!! New subscriber!!!!!

When changing interconnected batteries you MUST change ALL of them. They all have to be the same, and should come out of the same box. Otherwise, they can overheat. Mister hypocrite here, once mixed 2 different brand AAA batteries in a flashlight. It worked fine. A couple of weeks later, it was warm to the touch, and needed to be discarded. If that were a TV remote control, back-up sump pump or other battery operated device, it could be a significant cost to replace, let alone a fire hazard.

My one Ryobi battery is dead, I need you to repair it!

Is 12 an unlucky number for you? You skipped 12 when counting from 1 to 16 :-)

Just fit five 18650 cells in that battery grip and charge it from now on with two crocodile clamps and a LiPo charger

I wish they would make these so you can just swap in and out bad cells easy by a spade type connector.

the Shunt diode rectifier prevent and protect reverse current polarity is fatal for nicd and nimh cells in series conection. and increase battery long life for power tools. all information in maxim integrated. reverse current battery polarity protection."sorry my english".

I am going to do it different and then report the results to you. First I will use some chemical to dissolve the glue. Then I will seek out the existing (bad batteries) in the current pack and remove it, and attempt to super charge the bad batteries individually using alligator clips and a 9 volt battery--unless-they will charge in a standard battery charger --I will use that method. My attempt is to find the reason the battery failed and restore all bad components prior to re constructing the battery. I will replace any bad batteries found in the pack if they will not take a charge. I suspect that there only a few bad batteries in each pack. Using a volt meter to test each battery in the pack first. I will get back to you once the project is completed.

OF COURSE HE COUNTED 10,11-13,14

i just recently replaced a nicd battery with a lipo cell + protection board. it can be charged with the old charger and works with the drill. buuuuut i tried drilling metal with it and the controlling mosfet gave up, so there is only on or off now on that drill XD too many amps from the battery i guess

you made two mistake one is you mixed ni-mh with a ni-cd which is not a fatal error but you put in a much lower capacity cell ,and i am sure that cell will be overcharged and the battery wont last

What happened to 12

i hope he's better at dealing with electricity than with counting

Nice brand

yep counted 10 .11 13

I also have the same issue with my battery

hey it did the temporary job hope it last long enough to buy a new one

The bad thing is that in use the good cells will force a reverse polarity on the weak (low capacity) cell and that will kill the low capacity cell in very few cycles. Actually depends on how long the use is continued after the weak cell has reached zero volts. In principle that happens at point when 1.2 Ah has been consumed. On the other hand, during charging, the weak cell has to dissipate its share of the energy into heat after its 1.2 Ah has been stored. Ugly treatment either way!!

All the cells will drop to the lower voltage cells

You counted wrong. You skipped the number 12. There are 15 cells not 16.

I have 12 I need fix how much

Hej med dig har du set der er komme nyt Firmware update Canon EOS 600D v103 kan se at du har lave en video med nr 02 men ikke med 03 fra kan se den jeg har funde er fra 2016 vol jeg lige sige !! vis du stade har kammer jeg likke osse inde med såden et kammenr !! m.v.h Paw

DeValt

10, 11, 13, 14. Yes you counted wrong

Dont forget to recycle the old batteries. Wonder how many people recycle there batteries.

so i will keep my old batteries, and rebuild. with one being sacraficed

simple mth 1.2 X y = 16

First! :D

First?

LOL U SAID 10 11 13 14 HAHA

what a waste of time

I never see the point in messing about with batteries. Put in recycling and just buy a new one. They are so cheap compared to messing around. Also a bodged battery will just let you down at the worst possible moment. A false economy.

Learn how to count