I had a couple of spare Flipper Zero batteries lying around and noticed they actually fit pretty well in the Nintendo New 3DS XL.
I made a simple adapter using some prototyping board so it can make contact with the battery pins.
Battery Mark test results:
Stock (old) battery: 5h 08m
Flipper Zero battery: 8h 10m
I’ll run a few more charge/discharge cycles and see how it holds up over time.
Posted by RJ01988