today the china batteries arrived. Okay, they won`t win a price for their connectors... But it works.

I just opened one of them, removed the inner li-ion cell form the electronics, connected the cable to extern batteries with it and putted some plastic in for replacing the cell.

For security there is a schottky diode in the cable - this changes the voltage by -0,3V and secures it against inverted voltage.

Tomorrow I`ll test how long this will run the gps and the display.



Yes I know... I still need another battery holder


Because I did noth think about it myself before writing