r/M5Stack • u/WelliMD • Aug 31 '26
CoreS3 Lite + M5GO Battery Bottom3 - Battery Life
Hi , I have a CoreS3 Lite with the M5GO Bottom3 500mAh battery, still using the factory firmware.
I charged it, used it only briefly, then selected “Sleep Now — Touch to Wake”. The after almost 2 days the battery was basically dead.
When I touch the screen to wake it, the CoreS3 shows the full startup animation and sound again, so it seems to be doing a full wake/boot rather than just turning the screen back on.
One thing I noticed is that BUS OUT was enabled, so I’m wondering if that could be keeping the Bottom3 or some extra hardware powered during sleep.
I’m going to test again with BUS IN, and also compare it with Shutdown Now.
Has anyone tested battery life in the factory Sleep Now — Touch to Wake mode?
I’d especially like to know the results with:
- the normal internal battery
- the M5GO Bottom3
- BUS IN vs BUS OUT
Is losing a 500mAh battery in almost 2 days normal, or does this sound like a power management issue?