RETRO battery

Has anybody looked at adding a battery for RETRO?

I am thinking about small battery charging breakout board with its own micro USB connector.


Or you could just use one of these.

I’ve seen something similar for $1.50 too.

If size doesn’t matter then use a USB powerbank like the Juice Up!

Size always matters… :wink:

@ Experimenter - I was thinking more about something that I can put between RETRO and back plate in the enclosure I have made for it: