4s3p Module with 12x Panasonic 2250mah 18650 cells - Philips M3538A

Here are excellent medical modules to salvage 12 genuine Panasonic CGR18650CG cells. These particular modules are easy to open, just have to crack the case around the seam. No glue to deal with. Just 54 cents per cell.

Medical batteries in particular are great sources to salvage cells from because they are typically only cycled a few times. We tested a lot of these cells from these packs and got great results. The BMS is proprietary so the value here is for the cells inside and the scrap value of the circuit board.