Originally Posted by
Clyde1820
... Getitng a better Li-Ion rechargeable when that older rechargeable begins to tank is easy. So long as the basic lighting unit isn't hamstrung by only allowing a certain older kind of cell.
And, you have to be able to get it open without damaging it so bad you can't close it up again.
A lot of devices that are not intended to be repaired are built in such a way that the only way to open it is a hack saw.