This is the case for simple boost module with constant current limiter to allow you charge m365 (or any other scooter) from 12V (or 24V) car battery/socket or from PD charger or power bank (this can be slow - but it will work).
A bit more about boost up board - here: https://adrian.siemieniak.net/portal/how-to-charge-your-xiaomi-mija-m365-scooter-from-car-or-power-bank/
m365_charger_case.stl | 235.6KB | |
m365_charger_case2.stl | 100.7KB |