RePower

Recently I became an owner of 5 (five) "ancient" tablet PCs (HP Slate 2) and found them verrry interesting from inside ... hmmmm... side. Among other components LiIon batteries were found, 2 pcs in every tablet, upto 15Wh per cell. Measurements found out the perfect capacities, almost 4300mAh per cell (while they are marked as 4000mAh). Thank you, HP, for your careful choice of components suppliers years ago! As I have already owned some PowerBank PCB modules that were not found to be of any use