reviving dewalt batteries
 

anybody know how to revive a 14.4 dewalt pack ? I have an Imax b6 charger or a dynamite 20min quick charger. The pack dies in 10-15 min under normal use.

What are you using it on?

You might be able to get a bit more run time out of it by running it down normally, then dead shorting it for a bit. Then charge as normal.

But ultimately, batteries wear out. How old is this battery? If it's more than, say 3-4 years old, it's lived a full life.

If the batteries are Nimh, then there is likely nothing you can do. In fact, I would put money on the fact that they're just shot.

i took an old dead 18 volt dewalt pack apart and it had 15 1.2 volt C size nimh batteries in it....i was gonna get new batteries to rebuild it but it would have been better to just buy another pack by time i went through each cell to see if any were still useable........bob

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I watched a video where a guy zapped his dewalt batt with a welder and brought it back to life.

Give it a whirl....make sure to have the video camera rolling....."thumbsup"

I had good luck reviving Nimh cells back in my racing days using a trinity dyna pulse discharger as part of my maintenance routine. It takes forever to discharge a pack using one, but it seemed to make a difference. I'm sure a dyna pulse could be had for dirt cheap these days...

I have a variation on the B6 charger, all I did was hook up the leads of the battery pack to the charger, put it in nimh cycle mode, and let it do work. It will charge it, then discharge it, in cycles, to try and re-train the batteries. Just make sure to keep the amperage fairly low so it does it slow.

This won't work if the cells are completely dead though, and if they are li-ion, DO NOT use the nimh setting.

Also, check the voltage when it is done charging, if it is anything over about 19v, or under about 12v, then something went wrong.

I was actually planning of disassembling my spare drill battery charge station and re-wire it to work with the T6 charger so that I can just set the battery in the station to charge quicker than the original station.

Sorry for the late update but it worked . This drill have been sitting in my basement for 3 years waiting to find a new pack . I never could get them to charge and after I hit them with my mig about 20 times each I threw em on the charger and whamo working drill . If necessary I will make a video .

will that be like "hold my beer and watch this" :lmao: "thumbsup" .......bob

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Naw more like , I cant believe you actually got that to work ! Bob your are one ballsy genius "thumbsup"