AtomS3 things that would be nice to know...

• Can the MPU6886 be powered down?
• Does the SY8089 power everything? (if not, is the EN pin connected to GPIO?)
• OLED uses GC9107, can it be powered down? (to prevent parasitic current)
• AtomS3 also has an internal WS2812 LED, is it connected? can it be powered off? (to prevent parasitic current)

Replace the Battery Management IC with one that:

• Has low voltage cutoff (to prevent damage to battery)
• Has no low current cutoff (interferes with long runtime and using deep sleep)
• Battery charge & state info (via I2C with internal switch to connect/disconnect from Grove port)

sounds like a you problem :P

sounds like a you problem :P

https://www.thingiverse.com/thing:4764611

Replace the Battery Management IC with one that:

• Has low voltage cutoff (to prevent damage to battery)
• Has no low current cutoff (interferes with long runtime and using deep sleep)
• Battery charge & state info (via I2C with internal switch to connect/disconnect from Grove port)

https://shop.m5stack.com/products/atomic-rs232-base-w-o-atom-lite
plus
https://shop.m5stack.com/products/grove2dupont-conversion-cable-20cm-5pairs

How about one with 50 buttons... :D
https://shop.m5stack.com/products/cardkb-mini-keyboard-programmable-unit-v1-1-mega8a

AtomS3 things that would be nice to know...

• Can the MPU6886 be powered down?
• Does the SY8089 power everything? (if not, is the EN pin connected to GPIO?)
• OLED uses GC9107, can it be powered down? (to prevent parasitic current)
• AtomS3 also has an internal WS2812 LED, is it connected? can it be powered off? (to prevent parasitic current)