Dewalt 20v Battery A Look Inside

[Oka]

I am working on anew tool for work and needed a cannibalize a Dewalt battery. I had a 2013 2 amp hr battery that was beginning to not hold a charge.
So, I took it apart to get what I needed from it. As you can see, it is nothing more than 5 - 18650 3.7 volt batteries
wired in series. The actual battery is 18.5 volts, but most lithium batteries are charged to 110% of their rating which makes it able to hold a 20.35 volt charge. Ergo a 20v battery claim. I would bet the 5 amp hr ones are 2 sets of 5 set in series and then tied together in parallel.

Kinda cool huh ? ....and this habit of taking things apart got me the title as a kid (smash, rip and ruin)

.......... some habits never die..........

 

[Dee2]

Batteries + has rebuilt battery backs for wireless tools for me in the past. You could probably buy the batteries without cannabilizing DeWalt's package, but where is the fun in that?

 

[Gofor]

Kits and individual cells for NiCad 12v and 18v are readily available on line. I haven't checked for the Lithium ones though. (Probably ground shipping only) . That one sure looks simpler than the 18v DeWalt NiCad that has 15 cells hooked in series and stacked to fit into the case.

 

[mdbuntyn]

If you want to nerd out on battery packs, look around the AvE youtube channel. Be warned, he uses a lot of "colorful" language.