Hey bro I just want you to know that you saved me a bunch of money !!! I was about to buy a new set of tools because I have porter cable 18volt system with many tools and attachments . I did this trick and boom all of my batteries came back to life and are holding 16.5 _ 18.9 volts again ! Thanks so very much . I'm glad I ran across this video.

Sir, your courage and willingness to stand up against big battery is commended! NOTE: I didn't have wires like the ones shown in this video so I tried the insulated speaker cable from my home stereo. Worked

Excellent! This procedure also worked with my Greenworks 40V battery that acted dead. Jumpered it with another Greenworks 40V. Thank you for your well done video!

Just used you trick on my dead Ridged battery, it's charging now! Thanks for sharing, you rock!

This technique worked perfectly for me. My charger only flashed red. Cross wired with a Dewalt battery and now both Porter Cable batteries are Back in action! Thank you!

Absolutely phenomenal!! Saved me $200. Worked as advertised. Jumped for 5 min. Then put on charger n got the green charging light. Great information !!!

I was about to throw two batteries away until i found this video! 30 to 45 seconds connected to a good battery and now they are both charging! Thanks you!

I guess I left my battery out side in my shed over Winter after I had ran it dead. I just did what the video showed and now it's charging. thanks save the day

Thanks. Did what you suggested and my pack is charging up. I hooked mine up to a power supply for a very brief time and put it the charger. Green to go! Sure appreciate your taking the time to post the video. Two thumbs up.

Worked like a charm. Haven't used the battery in over 5 years and was low at 1V. I used my fathers good battery and it worked instantly. Thanks a ton.

I can't say this often about KZfaq vids, but this actually works, thanks. I received a new 20v 1.5 lithium battery from eBay a few days ago, wouldn't take a charge. Received a replacement just today, same thing. Watched your vid, hooked up the wires for literally maybe 30 seconds, hooked the battery up to the charger and bingo green light flashing, (charging).

Dude this video help me out!! I almost spent about $50 to replace a damn near brand new battery and your method worked flawlessly thanks

I just did it and it worked. Super easy. 2 min. Now my battery is currently on the charger! What a simple but super helpful tidbit of knowledge!!

Genius! Just spent a scary twenty minutes in my shed worrying I was going to electrocute myself, but batteries now charging again. Clever stuff. Thanks!

Mate, u deserve a large beer. I had a battery which i didn't use for a while and it entered in error. With your video i "saved" it. Thank you

I knew that some automotive battery maintainers had that feature and I didn't even think about that being the problem with these. I'm a diy guy at heart but when tools dont work I want them back up ASAP. So, I was minutes from ordering replacements. THANK YOU. you saved me a ton of money and made me think.

Thanks so much was about to buy my little brother a new 3sip 11.1v 2700mAh lithium battery till I saw this. Work like a champ you just gave me a great idea with all the old batteries that people get rid of.

Thanks. In this video you suggested only using the same type of battery. I had a 20V Black & Decker battery that was used for a backpack sprayer that was accidentally left on. Voltage had dropped to 1.9v and would not charge. I did not have any spare batteries and did not have a need for another batter so I took a chance and used a 18v Makita battery and jumped it as shown and I now have both batteries in their charges and they are charging fine. Saved me $30 for a battery I didn't need.

This worked to revive my Biswaye 18v Li-ion batteries. Easy and effective, thanks Anthony, you saved me from having to buy a replacement!

It worked for me. Left it on bout 10 seconds. It started charging. I used what wire I had. It was too big to fit in slots so i cut a few of them off to where it would go in. Saved me money man. Thanks.

You saved my Porter Cable 20v's life!! Have never charged the battery and ran it til it died. Would not take a charge. Only came with one battery, so I used a Black & Decker 20v Weed eater battery to jump it with. Worked like a champ. Thank you, Thank you!!

Just saved two porter cable batteries by your video. Thanks a lot.

Bro...... YOU ABSOLUTELY ROCK. I just picked up a brand new porter cable drill with 2 batteries and charger for 50 bucks because the store said the batteries were shot, lol. I literally jumped the new ones for a few seconds, not minutes, and they're both charging. One was blinking red fast, and the other was blinking red for over temp, I'll find out if they take a full charge or not in a little bit but damn, best video I've seen on KZfaq yet.

Brilliant, thanks for that simple but valuable advice. My Worx battery couldn’t charge so followed this advice and connected to Dewalt battery and after being connected for a few minutes Worx battery started to charge in a charger as normally would. Saved me for buying new battery.

OMG this worked!!!!!! Brand new 20v lithium battery had it for a month and started doing this. Tried this technique and worked. Thank you so much you’re amazing

Same situation with the blinking red light. I found a battery (likely never used) in a Porter Cable hard case (I must have bought duplicate combo packs throughout the years and forgot about the battery). The date on the battery was 2013. This "jumping" trick worked for me (at least after 5 seconds of getting jumped its charging now). I did get a little spark on the final wire connection from pos to pos, but I only peed myself a little. Saved me $70. Thanks!

Thanks for sharing this great video with a simple procedure and without a lot of mumbo jumbo confusing stuff. Right to the point. GREAT!!!

Yep, worked on old porter cable 18v li-ion Battery like a charm. Thanks for taking the time to explain and demonstrate how and why this works. Jesus is King!

Brilliant! And awesome explanation in the video. Worked like a charm I had one of these 20V batteries that wasn't even 2 years old that wouldn't charge and now it's happily green blinking away. Hopefully it will work on my original battery that came with the drill set too!

U my son have just saved me 90 quid . Cheers Legend

This really works. I have a brand new Xtra Large 20V that I hooked up for 5 seconds .. and it bounced right back up after charging. THANK YOU

This actually worked for me! I tried everything. Even put the battery 2 days in the freezer. Nothing worked. Tried this with a new battery. Waited 2/3 minutes. Plugged it in and it worked. It was with a black+decker battery. Thanks a lot!

Anthony, I got a Porter Cable 20v drill with two batts. I moved years ago, packed them up, forgot about them til recently. Neither battery would start to charge, I got the rapid blinking red light. Used your method in the video with a known good 18v batt. Both of the 20v are now charging. Thanks for the tech tip.

Worked like a dream on 2 60v Black and Decker batteries I brought in the house over the winter. Had to use a Craftsman Battey to jump them. Use a volt meter! Saved me $200+ Thank you!!!

Thank you so much I lost a battery two years ago finally found it and now I got it charging again and didn’t have to spend $70 on a new one

thanks. even after 4 years this trick still works

It Charged!! I'd heard about doing this to kick-start a battery & I had the perfect candidate. A Porter-Cable 18 volt NiCd not used for a couple years after not charging. Showed 7 Thousandths of a volt on my Fluke dmm (0.007v)! Made some jumpers with a fuse and jumped it for 3 minutes. Put it on the charger & it charged for almost an hour. Can't wait to see how it performs. Thanks

I just went out to my garage to see if I could fix two of my three Craftsman batteries that only worked for a couple of months. I’ve been doing all of my yard work with one battery, sharing it between my weed eater, blower and hedge trimmer. I cut a couple pieces of wire, followed your instructions and less than a minute later both of the dead batteries are charging!! Many thanks to you for posting this!!

I had WORX cordless drill and just bought a new charger and realised one of the batter was not charging. I used your method and it worked. The only difference is I had to keep my battry cannected for 15 min. I owe you a shot of Whisky.... Cheers my friend

You are the man ! I really appreciate your help. Two thumbs Up !!!

Amazing, thank you!! Battery on me almost 2 years ago but never tossed it, just did this for 2 min and it’s fixed!!!

Awww man, my battery was stone cold dead, I just tried this method, it freaking worked, thanks a million man...that's just wonderful...

That worked like a charm!!!!!!! I have an 18 v Porter Cable and one battery hasn't worked for a long time. Just ran wires like he said and spark and now its charging

Wow I just did the test on my battery Porter cable 18 was dead Srprise, it works like a new one. Thank you Man you just saved me at least $ 50 or $ 60. Thanks

This saved one of my black and decker 20v smartech bluetooth batteries! Thanks bro! Made my day!👍👍

Super helpful. Thank you it sounds simple when you say it but I never thought of it.

Thanks for this video. I drained a battery using my Porta cable flash light and it was fairly new and couldn't figure out why it wouldn't charge any more. I did this and it works fine now.

Worked on an Einhell battery. It didn't show any recharging lights on the 'dud' battery; but after only a minute it had sufficient charge to then be charged in the original charger. Thanks for sharing this. Saved me £35/$50.

Thank you! Fixed my expensive sprayer battery. I didn't have a second one similar so I used my 18v drill lithium battery and looks like it's working now.

Just saved me a bunch of money. It's charging like a champ right now. Thank you.

Thanks so much for posting! Bought a new Porter Cable Drill with 2 batteries and neither battery worked. This fixed it!!!!

Great video..you just brought my PC 18v Lithium battery back to life.. 2 thumbs up to you..

Can’t thank you enough for this video. And the explanation was perfect as to the why. I had 5 new in the package batteries from 2019 that I just opened and every one of them was doa, and I was freaking out, cussing out the seller, who I knew was long gone. Saw the video and made a set of jumper cables and now every one of them is fully charged and ready to go.

Thank you. Searched and this was the 1st video that popped up to me and it was money. Again, thank you. My battery is working again. For the record, I used a 20v B&D battery to "jump" my "bad" 20v Porter Cable battery and it worked.like a charm. 😉

Worked like a charm on Black and Decker 20V Lithium! Thanks a bunch!

Tried this on a Total 20v 4.0Ah battery that refused to charge, tried this method and within seconds it worked and was charging again. Thank you.

Dude, You saved me $200 to buy a new 58V battery for my echo weed eater. The charger says the battery is no good, I metered the large battery it had about 2 volts. I connected a couple of wires from a Harbor freight power tool battery for about 60 seconds and I was off and running! Thanks !!!

Thanks for making this video. I had a battery not wanting to charge. Did what you said, and BAM. It work. 👍👍

hey @anthony heath thanks for your video i was about to throw away 4 batterys......now they working perfect!!!!!!! your the man!!!!!

People like you are great, seriously. These days you can find just about anything on KZfaq, and I think we’re all grateful for that. Thanks 🙏🏻 this worked for me.

This really worked. Thank you for the insight and education. You saved me time and frustration.

I want to add my appreciation like all the other comments below. Thanks... I got my previously dead battery to charge.

Worked on my B&D 40v battery. Thank you - saved me from buying a new expensive battery.

Wow, did not expect this to work, but I had some free time and a totally dead battery, so what the heck. Only took about a minute to bring the dead one up to the point where it would take a charge. Thanks!

Same as some of the other responses. Newer battery that went unused for about a year (moving and in storage). Worked perfectly. Thanks!!!

Just about to throw the bad battery away until I ran into your video, Thanks!!!!

Awesome vide, thank you. I was so frustrated with my battery and drill over this condition and I had tried so many things and wallah your instruction did it in under 2 minutes. Thank you thank you

Wow! Worked like a charm on my B&D 20v (same as Porter+Cable). Awesome since the bad one was my 4.0 AH battery.

Thank God! people like you can help a lot of people. Tank's

Great fix. My 40v battery for weed whacker would not charge. Used my 20v DeWalt to get charge up and it’s charging as I type this. Thank you.

Thank you! Thank you! Thank you! I took some speaker wire and did exactly as you said. It worked perfectly and in less than a minute! My battery pack was actually brand new but it has sat unused for about a year. I was using another battery pack that never seemed to need charging until the other day. I watched videos claiming the battery was dead and won't ever charge or that I needed to take it apart and modify the wires and/or replace the battery or that I need to buy a entire new battery...blah, blah, blah! Then I found your video and thought I'd give it a try. You are a genius. I love simple solutions. Yours was the best out of all of the videos. Thanks again.😊

Huge thanks from tn. Just bought compact and reg drill combo with battery and charger and was freakin out.

Worked great. Got garage sale find battery back to life. Thanks.

Thank you Anthony that was genius I can't wait to try it.

Awesome I saved a bunch of money watching this thanks

Many thanks from Germany, u saved my Bosch 18v battery!

Waiting for battery pack to charge. Passing the time on Utube and saw this. Remembering this for future problem. Thanks!

Awesome video... years later- you are still getting views!

Thank you. It works perfectly. I had already discarded one and wish I had seen this earlier.

I want to thank you for shering this trick, I tryed and all my bateries are working knowa

I just fixed my 58V echo battery 🔋 thanks for the video. ✌️

Thnx brothah! Just saved my lawn & weed wacker! ;) Appreciated this video much- Cheerz!

I just wanted to add that you helped me out too. Thanks for sharing - (2 Porter Cable 18volt Li-ION batteries. They don't sell them anymore.

Well demonstrated! I've just fixed my battery this way. Many thanks

I know this is old but still works a treat!! Thanks Dude!!

I used a 18v to the worx 20v few minutes in and good to go and starting to charge again... Great Video many thanks I owe you a beer!!

I have tried it and it works thankyou saved me money.

You are awesome... now my battery charging again. Thank you.

Thanks!! Took about 30 seconds hooked up to the good battery, bad one is now charging.

Thanks!! This worked perfectly! I found an old Porter Cable battery in my garage that had never been used and would not take a charge. Now it is brand new again. You the man!

Just tried it. Works great. Thanks my friend for sharing.

Great stuff! Ill try it tomorrow! I know the trick with the 18650 cells to connect them one "dead" with one fully loaded and keep them for fiew seconds. This can also be done in this case too. You just have to ooen the bagtery and search for cells that are "dead". Thanks.

GREAT VIDEO!! Thank You for sharing!!

This 7 year old Vid saved me a yelling match at walmart about a dead Hart battery. Thank you!!!

It worked for me saved me $100 for a new battery thank you

Just like you said. I left it on for 1 minute. Good battery, 20v 4.0Ah to 1.5 Ah bad. Works perfectly. Since Porter Cable sent a replacement, now I have 3 batteries. Nice...

Worked for me! It puzzles me how a helpful video still gets thumbs down rating.

Thanks for the video!!! Saved my batteries!! Awesome Job!!

Thanks for the tip Anthony, appreciate it.

You are balancing the batteries.. Good stuff!!