Battery and care
A 450 mAh cell, charged over USB-C at 5V. Any phone charger or laptop port works.
How long it lasts
E-paper uses no power to hold an image, so what drains the battery is changing what's on screen and talking to your phone — not leaving it switched on.
- Frequent use, a working day on set. Around two weeks on a single charge — regular lens changes, syncing, and screen updates through the day.
- Light use. A couple of months — set up once, read from occasionally, few changes.
- Standby, untouched in a bag. Months.
Sleep
The M1 doesn't turn itself off — it sleeps to save battery. Press any button to wake it.
Settings → Sleep timer: 8, 12, 18 or 24 hours of inactivity. A shorter timer is the single biggest thing you can change if you want more days between charges.
Low battery behaviour
Below a low-battery threshold the device (15%) refuses anything that writes to it: syncing, firmware updates and resets are all blocked. A device that dies halfway through a firmware write is a device that needs servicing, so it prevents before that can happen.
Charge it and try again. Nothing is lost.
The housing
The M1 isn't sealed. It handles a working day outdoors, but it isn't rated for rain or submersion. Treat it like a light meter, not a camera body.
Water and dust
Left in strong direct sunlight for a long stretch — which, mounted on a camera, happens — the screen can take on a faint yellow cast. It returns to normal shortly after it comes out of the sun. The UV filter in the glass is there to keep that from becoming permanent.
