Battery fits fine with extra room, as of today i have not fixed the backlight. From looking at the teardown of the kickstarter edition i may have to disassemble a little further and find the soldering on the backlight. Another trick was to discharge the battery fully and see if its comes back on. So far I'm still discharging @ 50% battery. The LED is on the PCB though, no idea why that doesn't work. I'm 50% sure this is because i struggled abit to get the black plastic frame out of the metal case and maybe broke the backlight solder points. Or because the is damaged somehow, the latter would suck because i don't know where to find one.
Edit: Also i should probably check if i lifted the resistor next to the battery connector
I have sorta successfully replaced my battery with a 402020 from aliexpress.
Replacing the battery was pretty straight forward but now i have no backlight or stauts led.
I'm yet to see where i went wrong, reaseating the flex does nothing. Battery seems fine so far though.
The resin came of with my finger nail and was not hard at all, apply flux and a suitable tip for the job
The new battery came with small wires with the positive end taped off.
Where to order pebble steel Battery replacement
There are some really small batteries on aliexpress, do you know the measurements of the original one? I kinda want to replace mine as battery life has been declining.