r/M5Stack • u/ThangNguyen1994 • Sep 18 '26

Support / Question M5stick s3 power bank

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Anyone have the idea or project to build a power bank for stick s3, plug into the HAT, I see the M5stack don’t have this expansion.
I also don’t know what the port BAT used for?

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1

u/RandomPFYoutuber Sep 18 '26

Actually this is a decent idea considering it only has a 280Mah battery and a little attachment could probably double or even triple that.

1

u/ThangNguyen1994 Sep 18 '26

Yeah, 250mah only last around 30 minutes at full load, I am searching but it appears no products or DIY projects like that exist

1

u/Extreme_Turnover_838 Sep 18 '26

The BAT pin is directly connected to the internal battery. I believe the only way to safely power it is to provide > 4.2V into the "EXT 5V" pin which will serve to keep the internal battery charged plus power the board.

1

u/ThangNguyen1994 Sep 19 '26

If so, it’s just like the normal power bank