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