Product End of Life
This product has reached the end of its lifecycle and is no longer available for sale. Documentation and information remain available for existing users. An improved next-generation version is currently in development and will be released in the future.
The key technical characteristics are presented below:

*The Xiaomi edition of the BMS requires the discharging plug reinforcement for 30A+ discharging, as the original plugs are 30A rated. The BMS and wires are strong enough for 44A discharging. The Ninebot edition is ready for 44A discharge out of the box.
**The Xiaomi edition of the BMS requires the charging plug reinforcement for 3A+ charging, as the original plugs are 3A rated. The BMS and wires are strong enough for 5A charging. The Ninebot edition is ready for 5A charging out of the box.
Take a look at the Happy BMS introduction post in our blog: Happy BMS: 9s-15s smart BMS for Xiaomi and Ninebot scooters
There is also a Happy BMS based internal battery detailed assemble tutorial: Custom extended battery for Xiaomi M365 / 1S / Essential / Mi3
Happy BMS user manual: https://public.embedden.com/Happy_BMS/Docs/English/happy_bms_manual_latest_en.pdf











ikouvalakidis (verified owner) –
Excellent BMS !!! Fully compatible with my Xiaomi M365 Pro. Premium built quality. I believe it’s the best replacement if your BMS was broken or you want to built a better battery.