Chosen Solution
Its not really kinddle 3 its prestigio liberrto but they look similar. i cant find replacement battery for this ebook reader, can i just solder similar lion battery wires to these 3 contacts? am guessing +, -, and BSI? My problem is i dont know what generic lion has 3rd wire for bsi or what ever this 3rd one is, i guess i can also short - and that third one and try like that?
This ebook reader uses common BL-4L and BP-4L nokia battery so its much easier to just buy new one
The third wire that isn’t labeled is usually a thermistor to make sure the battery doesn’t overheat. It may boot without that connection, but you may have to add a resistor to trick it into thinking there’s a thermistor that’s at the right temperature. Adding any lithium ion battery should theoretically work, just make sure to check that it isn’t bloating or overheating after charging before calling it good.
