What Batteries Are People Using For Their Clones?

what kind of battery are you using to power your diy arduboys?

I’m using 5v pro micro board.

I’m using rechargable Nimh AAA batteries in combination with 3.3V voltage booster with my Pokemon Mini version and brick game clone version.

For my Dreamcast VMU versions I will use CR2032 for one and lipo battery + li-ion charger for other.

for my big 2.4" one I’m planning to recycle a 18650 Li-Ion with 5V voltage booster/charger board