The smaller purple batteries are out of a 9 year old laptop battery, where the laptop wouldn't charge them, because they spent most of their life being discharged. Disassembled that battery pack, and they all charged up.

Those are Samsung 2800mAh 28A 18650's
Cell 1: 2853mAh
Cell 2: 2486mAh
Cell 3: 2845mAh
Cell 4: 2828mAh

The green cell is one of the batteries taken out of the DeWalt battery pack