Dewalt Battery Charging Fix

Dead Dewat battery that won't charge fix!

[@niccodeamus1]

Massive thumbs up for this tip...worked for me....no lights on the charger, no charge in the battery. Jumped it as described and it immediately started charging

[@tylorkirklin4636]

Bought a two pack of batteries one worked perfectly the other I couldn’t even get to start charging I jumped them and now it’s charging up nicely! Thank you!

[@dougswanson]

Worked for me! One of my 20v MAX batteries was reading 6.7v on a meter. Charger wouldn't even recognize that it was there. Drills and impact would flash the little white LED when pulling the triggers, but that was it. Gave it a jump start from my good battery, using your method, and now the charger is charging it. I've never run the batteries down this low from use in the three years that I've had them. Only explanation I can think of is that the tools go into a soft carry bag--one of the triggers must have became depressed against one of the other tools, and drew it down too far. I now take the batteries off of the tools before putting them into the bag. Thanks for posting this!

[@James225]

I can't believe this was my problem with a brand new battery. I've had DeWalt batteries and tools for over a decade now, NEVER ONCE have I pushed it down to where it clicks like that and they've been charging all this time just fine. Get the new one and it wouldn't charge. Now it does. Crazy....thanks.

[@jslakenes5540]

Just did this with a battery I bought with drill on clearance. Display model. I put it on charger and didn't even blink. I "jumped" it with a good battery for 10 seconds. Put it on the charger and bam! It works! Was just using that batter in the drill last night. Thanks for the tip! Thumbs up to you!

[@svtcobra281]

No charging light at all for me on one pack, followed this, now it's at least flashing like it's charging! Thank you for saving me money!

[@dustinlocke1278]

My 1.5aH 20V battery wouldn't even light up on the charger. I tried this and after the first time, got it to blink once on the charger, but then it went dark again. So I tried this again and left the wires hooked longer. And it worked! Bless you, sir.

[@cbreeling1]

This worked fantastic. Only caution is don't leave them connected for long as the wire gets hot. You only need a few seconds. Save BIG $$$ with this easy fix

[@catalinhitman4556]

There are a few ideas for fixing a car battery never try to do this until you know what you are doing - the acid can burn your skin Test the voltage first - there may be a kaput cell which will waste your time. Check your battery fluid. Try to fully charge the battery. (I read about these and more from Rapid Renew Roadmap website )

[@darwinbayan7162]

This trick resurrected by flexvolt battery. I am reading 2.26V only in between B+ and B-. Use a fully charged 20V 1.5Ah only to pump up my flexvolt battery to 11 V, after that my charger was able recognized it and begun charging it. Thanks for sharing this trick, you’re a Genius!

[@paulmarshall9738]

This is awesome. I had a 9ah and a 5ah battery which were relatively new and not charging. Was dreading the hassle of returning to Dewalt for repair. This fixed it perfectly. You deserve an award for this video. You’ve saved me a whole lot of hassle, inconvenience and money. Thank you very much sir.

[@nikkileishman9856]

We bought a heavily discounted floor model drill for a great price. The battery wouldn’t charge and the charger light didn’t even come on. Tried this trick and we are currently charging! Thank you!

[@TangoBravo]

Just tried this on a 4.0ah 18volt XR battery. Totally dead before no green lights and no light on charger. Now it's charging nicely, thanks so much. *****

[@obfuscated3090]

What you are doing is putting the batteries in parallel. Not voodoo, just correct use of electrical knowledge! Good video! It just saved me a battery.

[@Killer-or1jb]

Yes but the average person doesn’t know this.

[@joem9422]

I had a 40v DCB404 battery pack that did the same thing. Press the button on the pack and there was no light at all. Not much use on this 1 of my 2 battery packs using with my blower and hedge trimmer, but it failed with the fast flashing red light when put on the charger. Cost for a new one was $180!!! I went ahead and gave this a try. Got one heck of a spark when I attached the final negative wire to the "dead" battery, but the unchargeable one is now charging like a dream. I will have to see if it still works OK and holds a charge like before. Thanks Richcan!!

[@scotthain4922]

Thank you!! Had a second battery from a set for 4 years that never worked. Tried this and now its charging.

[@fredhonsal246]

Got my new DEWALT DCD996P2 20V MAX XR Lithium Ion Brushless 3-Speed Hammer Drill Kit today from Amazon. One of the batteries had only one of the three charged lights illuminated, but when I plugged it into the charger the charger light stayed solid on (thought the battery was fully charged). I tried the magic trick in this video and now I get the flashing light that it is indeed charging! DeWalt should add a link to your video...thanks!

[@mmdeguz010173]

This is the quickest fix I did today. Thanks for showing this. I had a 20V 5AH battery that just stopped charging. Battery is dead when tested and charger does not blink. Roughly I would say, the battery is just about 1year or so old. I know my charger is working since my other batteries are getting charged. Anyway, I did what is shown here. You will see a small spark when you connect the negative, B-. I repeated it twice just for curiosity and I did not see the same spark. Plugged it into the charger and it worked! Thank you very much.

[@asurfr4ev]

Damn, this worked like a charm! I had a completely dead battery and followed the instructions. Now I have a fully charged and working Battery! It only took about 5 seconds for the jump start and a full charge on the charger. THANKS

[@tomwiseman185]

just got sent a new Bluetooth dewalt battery and it was dead, they sent me a new one and told me to dispose of old one! I thaught it's worth a try and did this, turns out it wasn't dud just dead but now it's working just fine, thank you so much, Tom UK (5star)

[@Docv400]

That's great, thanks for posting. I have a Battery that's not very old, wouldn't charge, did nothing when plugged into Charger, no light, just DEAD! Just went out and tried this method, and it's happily charging away now.

[@MrSpeedysteve1]

This fixed my all of a sudden dead, DeWalt 18V battery. Mine had no charge test lights and when connected to the charger the red light came on briefly and then was permanently off! Now charges perfectly. Expect a little spark when connecting as described. But only briefly connecting.. Thanks so much👍

[@Kamakazee2020]

Was going through pain ice mode when one my batteries weren’t working, found this video and now it’s charging perfectly

[@gabrieluvalle4968]

Man you saved me from buying new batteries. Had two batteries that wouldn’t charge at all, the light on the charger wouldn’t even turn on so I did what you did to jump start the dead batteries and bam!! Both batteries up and running again, almost brand new batteries too.

[@glencunningham5782]

thank you, just revived 2 Dewalt 20V 5aH batteries that I though were dead, charger didn't even blink when I tried to charge both, so again, thanks for the fix, you saved my north of $150 bucks!

[@williammartynjones3549]

Seriously, I can't believe that actually worked. You're an absolute STAR!!

[@fuzzyharmonica]

Looks like that make two of us with battery problems today

[@pmarteney]

Just tried this, and it worked. I’m amazed! Thank you. I didn’t have an extra 40v battery for the “jump start,” so I used a 24v one from a different brand, and it worked perfectly

[@williamwomack3153]

this works... i had two 40V dewalt batt... weed eater and blower... two chargers.. one batt found dead and would not charge; voltmeter said it was 12V the good one was 42V... the bad one just blinked fast; so i hooked up the wires just for a sec... made a spark, then it had 20V... now it is taking a charge...very helpful, thanks!

[@briandrakeart6688]

DUDE! You just saved me a ton of money! It totally worked. I used this method on the 20v 6ah big battery.

[@mateuszchelminiak9556]

Being in lockdown really got me doing anything to entertain myself, didn’t expect this to work but it did. Fixed 2 batteries that are about 5 years old, Cheers fella

[@willykoo9915]

Mateusz Chelminiak what cord is he using to jump them??

[@williamn01]

@@willykoo9915 just a bit of flex any flex etc that comes with a standard appliance

[@keyworksales6241]

Recommend using 12-16 awg wire

[@markbrzezinski8889]

Heat the battery up and achieve the same result. I live in Perth Western Australia which is a hot place and put the battery in the sun on a 25C day for 1 hour and that was enough to kick start the charging process. If your in a cold place then maybe use an oven at a “very low temperature” for two minutes at a time and see what happens. I know some other engineer will say the Lithium ion battery could explode and “that is true” if you leave it in the oven too long so please be sensible and do not leave the oven when doing this. Do not use a microwave!!!!

[@hoxton0932]

Have you tried the oven in low temp method? Thanks

[@Kelster8675309]

Wow! Found an old 12v dewalt impact driver with similar battery. 1 good battery the other wouldn’t even turn on the charger. Was going to throw it away and stumbled upon this video. It worked!!!!

[@nakedenby]

So helpful! Thanks for taking the trouble to share this - it worked straight away. Be careful not to leave the wires connected more than very briefly as it allows a huge amount of current to flow

[@christieedinger6274]

We tried this trick with a DeWalt 40v battery that had very few hours and still showed one led on the charge indicator. It works! Thanks for the tip.

[@lyleohrt7485]

Just did this. Battery charger would blink once and then not charge the battery. Did what you said and now its charging fine. Thanks for the info!

[@zack9912000]

Lyle Ohrt what he did is bypass the battery safeties and you take the chance of burning your house down

[@searae727]

@@zack9912000 STFU!

[@canuckfixit7722]

Great tip! However, if this is happening, it's due to the voltage of one of the cells dropping just below 3.7V indicating that it's starting to fail. This trick will keep you going for a while but it will eventually need replacing. That is when the one (or two) cells drops to near 0V and the charger won't pass a charge current through the pack.

[@Taravayn]

For the Dewalt 18v batery we can to fix it anyway? Thanks

[@davidjavorski2146]

I had a 2 month old 20v 5AH battery that wouldn’t even light up on the charger. This little trick worked perfectly and saved me from having to get another battery. Thanks dude!!!!

[@stevemartin4198]

This totally worked for me in a matter of seconds. I endorse this solution. I’m an industrial electronics technician. I can’t believe I never thought of this, but it completely makes sense.

[@chrisfonseca4741]

Worked like a champ. I was going to look up 1-800Dewalt and something told me to check KZbin...and voila, battery is charging. This is a few months old 5ah battery. Thank you

[@searae727]

Thank You! Thank You! Thank You! KZbin should have some kind of an Award for you and your video. I've never seen a video that helped so many people save some Major bucks!

[@yesyoga]

Rich, thank you! I was so bummed thinking I bought a dud charger or battery, not knowing what to do next. You saved the day!

[@antonionestico2748]

I tried this at work , and it worked , the battery began to charge, thank you very much it saved me from buying a new battery, still dont understand how that made it charge but it worked , again thanks a lot

[@Unkl-T]

Thanks so much! This totally worked for me on my DCB203BT battery pack. It wouldn't show any lights when the check button was pressed, and when plugged into the charger, it wouldn't show any lights either. Did not even attempt to charge or give me any indication what the issue was. Was online looking for how to contact DeWalt for a warranty replacement when I came across your video. Simple solution that just worked! Thanks again.

[@Gids165]

I was so skeptical of this haha, but it worked beautifully, thanks

[@garyolson2676]

This actually worked for me, saving the nearly $100 a 20 volt DeWalt costs. Took two seconds!

[@CFHGARZA]

Brought my battery back from the dead! I couldn't even get any light on my charger before. Thanks brother

[@michaelroseland6418]

This totally worked for me! I have a brand new dewalt 20v 5mah battery that comes with the dewalt blower. It had been charged once. It was totally dead and wouldn’t take a charge. I used this method and worked like the video. Saved me from a trip to the store to return the blower/battery. Thanks!

[@telephonerock]

Amazing trick! Saved me from having to buy a new battery. People like you make KZbin amazing!

[@philipphilipc6228]

I tried it with completely dead 6.0 40v & it worked! Thanks for helpful tip

[@djbynite2806]

WOW!! I just tried it on 2 batteries that have been sitting overnight and not showing a good charge. After performing this, i sat them on the chargers for a few minutes, and BAM! they were responding as if they were fully juiced!! Thanks alot!!

[@ttali211]

Man, finding videos like this make my freaking day. I had a battery with this same issue and I just found your video after just chalking it up to being bad. I can imagine that you have saved a ton of people a lot of $! 👏👏👏👏👏👏👏👏👏👏👏👏🤝🤝🤝👏👏👏👏🤝👏👏🤝🤝🤝🤝🤝🤝🤝🤝👏👏👏👏👏👏👏👏👏👏👏🤝🤝

[@paulmuzio7473]

Just did that to my "dead" battery and voila, battery is now charging. Thank you!

[@mnbytestube]

I hooked up wires after watching about half the video. (no lights would light up on my newer Dewalt DCB-115 charger at all) I hooked up the wires and they sparked when I did. He didn't have sparks. I let it sit for a few seconds and the wires got really hot. (like really hot really fast) The battery did take a charge though! It did work. I don't think I would leave the wires connected for very long.

[@davidr2515]

same works with a 9v if you go b+ to + and b- to negative. just sharing as I know some might not own 2 batteries. I just use this trick to save a battery that I got for free bc it was "dead". Nope, the guy just hadn't charged it in 3 years. Thanks for sharing. I had to do this a lot to my kobalt 40v til I junked it, but never had to do it with another brand and just wasn't sure which slots to push wires into. Thanks again.

[@christopherwalton577]

Just fixed 3 dead 18v dewalt batteries using this exact method. 2 worked perfectly but one charged for a little while then started showing me the overheating code. Guess that one can't be saved got it to where it said fully charged but will hardly run my grinder maybe 30 seconds until fully dead again. Oh well am still extremely happy I didn't have to go but a bunch of new ones, don't even really need the one that burnt up anyways since others are working now. Great video you just saved me 50.00+

[@PumpkinKingXXIII]

Thanks, I’ve drained a couple putting them on my daughters powerwheels. The batteries showed dead and This allowed me to get them going again.

[@TxGameBred]

I was getting no light or anything on my battery charger when I would put the dead battery on. When I initially tried this it didn’t work. I tried it again a few days later and it worked the second time. Amazing. Thanks for posting this.

[@toddcastle3926]

This actually worked! My battery was only two years old and never hardly used, but it wouldn't show any lights and wouldn't charge. I did this and now it's charging! Thanks for posting, it saved me $90

[@scott1506]

thanks buddy. saved me a new battery. 5yr old 2.0ah 18v battery. 1 single flash red charger. so did this trick , then back on charger and its working fine.

[@jeffjcannon]

This did the trick after one was dead after sitting unused over the winter. Got a bit of a spark when I connected the negative ports together! Thanks for the video!

[@robpriv3014]

I had 2 dead Dewalt 12 volt batteries that were dead like this and I didn’t have a charged 12 v battery to jumpstart it with. I just used one of those jumpstarters for cars and it worked!

[@DJZander01]

Thank you so much. This worked for me. I had a brand new battery that was not recognized on the charger and would never charge. I did this trick and it is now charging!

[@freddieherring5411]

Replacing batteries in a small town was gonna cost me a lot of $. Tried this and it works just fine. Thanks so much, you the man. Thanks

[@johnnymentero6313]

Thank you, thank you, thank you!!!!! My battery wouldn't even blink! It was completely dead! Genius!!!

[@mikeflip2204]

This worked great for one of my batteries, I thought it was junk. Only took a couple of seconds and saved me the hefty cost of a new one. Thanks for the info.

[@johnpuckett5789]

Thank for your video. I just jumped my non-charging battery and now the charger is recognizing it and it indicated that it is changing. I'll leave it on the charger for several hours and see what happens. Thanks again.

[@ctripps9769]

This is an amazing 'trick', thank you, you've saved me from having to buy a new battery for my DeWalt Coat.

[@jatoav8or]

Worked like a charm, Thx. By the way, those 18v nimh to 20v lithium adapters have a parasitic voltage draw and will drain your expense lithium ion batteries & ruin them.

[@eddybright]

Just tried this and...it’s charging! Thank you!

[@simonparke2728]

Worked for me almost immediately, battery was over discharged as it had been sitting unused for many years, now working as good as the newer ones I un necessarily purchased, great advice,

[@larryvet53]

amazing, it worked, left the batteries at a job we were at and found them 3 years later.

[@brunoalfredlopez8904]

This worked for a 18V Bosch battery 2.0Ah You saved me a 100 bucks, thank you man! Greetings from Peru

[@mattwags1986]

You sir just saved me a bunch of money. I killed the batteries using them in my son's power wheels truck then they sat in the cold for a bit. Thank you

[@peterriley2949]

Hi - I did this and it worked well - my battery did not even have a light - and same issue guys used a Dewalt light which drained it dead - thanks great tip

[@mac2too]

Before you try anything. Put your battery in the sun and get it warm to the touch. I tried for 2days to recharge my almost new battery with no luck at all it was just dead. I live in San Diego so it’s not that cold when I tried it in the mid to low 60’s. I was going to go to repair shop but I remembered how temperature sensitive this thing is. So I left it in the sun for an hour and BOOM started charging immediately.

[@mandolin69]

I have an 18 V DeWalt dead battery. I zapped it from a good battery, and it took a charge properly, HOWEVER the battery after a proper charge works at a lower speed. It works on the charger O K but when the light tells that the battery is charged, the drill works at a lower speed. Pat from Philadelphia

[@guitfiddle]

Thank you. I haven't needed to do this, but I always wondered if it would work. It is the recommended method for dead 18650 single batteries to. Glad to see it work with two DeWalt batteries directly.

[@aaronchoi9007]

Just wanted to say THANK YOU and that your trick saved me $$$ (I was 2 clicks from checking out on Amz with a replacement battery =D ). FYI to anyone else, I have a 20V battery, about 4 years old that gave up the ghost and wouldn't charge. It wasn't in use for at least the past 10-12 months and when I tried to recharge it the charger wouldn't even blink with this battery inserted.

[@chrisbrowning4543]

I have had my Dewalt for not very long, so one of the batteries sat for a long time not being used. I tried to use it the other day putting up hurricane stuff and it was dead of course and the light would not even come on for charging. Was going to buy another one,BUT i found your video so I said what the heck let me give it a try,,,,Hell it worked perfect, so, THANKS a lot for sharing that with me. Hope other people find your video, i see it has not been posted long. YOU saved me 40 or 50 bucks, thanks. I did hook it up to my 12 volt battery charger thou, same thing, if something happened i did not want to hurt my other battery just to let you know........

[@Joeybago12]

Just fixed my black and decker 20v power connect battery! Thank you

[@andrewhuntvocalist]

Just wanted to thank you for saving me money. Have a great week! Cheers!

[@dommer256]

I can’t believe this actually worked! I had a dead battery for over a year, about to throw it away and then came across your video. Thanks 👍🏻

[@rogerpoirier4015]

This really works! Had a battery pack that came with a drill a year ago. Was never able to charge it. After trying this technique, the battery changed normally. Thanks!!

[@rhondacallsmedave]

Thank you. I just did it and it worked perfectly. Like yours, my battery was fully drained and would not connect. Just like new automotive smart chargers. Won't charge a fully drained battery.

[@gman8132]

Thanks man! I've been having issues with an older Dewalt flexvolt battery for months that was only charging up to 1 bar then stopped. I cleaned the connectors to see if that would fix it, but it did the same. This trick worked. I did a 4 second jump and it was able to take a full charge.

[@DeeJay1984]

Thank you so much. I have 2 batteries for my drill and one of the batteries has never been used (7 years or more) and when I remembered I had it, it was to late - until I saw your video. It is now charging. Thanks

[@gercrowley228]

Didn’t believe it would work but it did ,on a good battery that had gone completely dead, thanks bud. Ger

[@emcc4164]

Duuuuuuddddeeeeee! You just saved me some money! Dewalt XR dead. Tried your trick and it's charging!!!

[@Crazyoldman84]

Awesome just tried this on a battery that wasn't showing any light at all and now it works thanks very much.👍🏼

[@mickrossler4498]

Wow! It works! My almost new 5 amp battery was completely dead and wouldn’t charge. That simple trick fixed it in seconds. Thanks for the tip!

[@spacefightertzz]

Ya I been wanting to do this with my Ryobi battery but just haven't done it. I done this with sealed lead acid batteries because I guess the newer chargers do some kind of detection that prevents charge if too low voltage. I have 2 lead acid battery chargers and 2 low amp battery maintenance and they all wont charge if voltage is too low. I think I already did this with one of my Ryobi packs because I remember leaving it on the charger for 72 hours and it still just showed bad battery. Another trick I learned. I had got a brand new Ryobi charger that it wasn't working, no lights came on when plugged in and the outlet did work. I just banged it really hard with my palm a few good times and it started working.

[@TheBasketballstar246]

That totally worked! Thank you. Mine gave a spark when I connected the last wire, but it worked!!!! Thank you.

[@20stewfan]

That worked. I was on dewalt website to tell them that one battery did not charge and site crashed when filling out info then i came here. Thanks A lot your awesome !!!!

[@BrothersJohnson1959]

Amazing! You saved me money, not having to run over Lowes or Home Depot to buy another battery. Where did you learn this? You're amazing! Thanks a bunch! 👍👍👍

[@rawlr9066]

Dude I want to thank you. I tried this and I couldn't believe it worked. I hope it feels good for you to help others because that's just what this video did.

[@marclorraine7357]

This has saved me £80 for a replacement battery. Thank you!

[@AshleyTooze]

you are a genius, thought my battery was destined for battery heaven but I did this and now it's fine. Shame I bought another battery in the meantime though.

[@MrPetrica24]

Very good,i fix my battery.I used just 2 months and after that stopped charging,now i fix thanks to you.Many thanks for your video.

[@NORMIES_GET_OUT]

I suspect that the charger looks for a minimum voltage and if it doesn't see it, it assumes the pack is bad as over discharging the cells can damage lithium batteries. The battery may not hold a charge as well as before if it actually did completely discharge, but it should still work. I understand why they do it because if it only operates at say 50% efficiency after being over discharged, most people would be cursing dewalt for having batteries that don't last without realizing their pack was damaged. The reality is that the pack is probably fine if you just got it slightly below the cutoff threshold and not actually fully discharged.

[@luvwahraan]

I've got the same charger with DCF894P2, but EU version marked 10.8V 14.4V 18V, and it works fine with both batteries. I recently bought 9 new batteries (lot a work to come (; ), but none can charge on it, even correctly putted in. After viewed your video, I tried to charge them with a piece of paper on the bottom of batteries and all works fine. So, this charger is just some not a good stuff. Thanks a lot for your video! (:

[@shipside]

You are awesome! I have had this battery sitting on my shelf for 2 years.Dewalt customer service was lacking. Still love my dewalts.