5s2p A123 ?

Here's a few - this is both packs after separating and taping into 5S1P config. You can see the bar where the 2cell and 3 cell "pieces" were joined in the one on top -



Here's a little detail on how the stock tabs were trimmed to "hold" the wiring, this is the same side of the pac with the bar. Note the + tab points down. The neg tab on this pac points down as well. The other pac is opposite to this due to the way the DeWalt pac is put together. I didn't want to remove the stock tabs and it wont really make any diff once balance taps and shrink are added. Thie wires will come out in the middle of the end.



Here's the other side of this same pac.



Last, here is the pac that is 5 cells straight from the DeWalt pac - it is the one with the fusible link - its between cells 2 and 3 (kinda hard to see due to the reflection of the wire, but the connector is reduced in area where the cells touch.



If this one was flipped over to point the wires in teh same direction as the others, the tab would be pointing up. Like I said, not a significant diff. I've numbered the cells as a guide in adding the balance taps.

Forgot to add- after I add the balance taps, I'll wrap the cells end to end to keep everything insulated and then two layers of shrink.

I'd estimate if I had everything needed to build these starting from a 36v DeWalt, I'd have a pr of batts ready to charge in 2 or 3 hours.

Soldering difficulty I'd place at maybe a touch more than average, but not much. Like I said earlier, if you can do deans, these won't be a prob. I would recommend nothing less than a 60watt iron though. I've just started using this 80watt Weller and I'm amazed by how quickly it will get the job done.