Apropos. You can make any kind of new battery simply by dismantling the original battery and reusing the connector and charging electronics and raw unprotected

Apropos. You can make any kind of new battery simply by dismantling the original battery and reusing the connector and charging electronics and raw unprotected LiOn-cells. This is safer than ordering god-knows-what batteries from Aliexpress. Size issues can be solved by sawing off protruding areas from back cover and duck tape (or 3D-printer). Thus you can have cellphone with swapable Lion AAA-cells for example.