42V 2A Lithium Battery Charger 5.5×2.5/2.1mm 8mm 3pin Plug For Xiaomi Ninebot Electric Scooters M365 Segway Li-ion Battery Packs

Specifications

Input: AC 100–240V, 50/60Hz
Output: DC 42V 2A
Power: 84W
Compatible battery: 36V (10S) Li-ion / Li-polymer battery pack

Connectors:
3-pin 8mm aviation connector
DC 5.5×2.5mm
DC 5.5×2.1mm
8mm diameter (Xiaomi-style connector)

Polarity: Center positive (+), outer negative (-)
Protection: OVP / OCP / SCP / OTP (over-voltage, over-current, short-circuit, over-temperature)
Housing: Fire-retardant material

Connector Application

3-pin 8mm Aviation Connector
For: Electric scooters (Xiaomi M365, Segway Ninebot), balance scooters, outdoor / industrial equipment.
Features: Thread-locked, waterproof, shockproof, stable in vibration environments.

DC 5.5×2.5mm
For: 36V e-bikes, tricycles, mobility scooters, high-power scooters.
Features: Larger inner diameter, higher current capability.

DC 5.5×2.1mm
For: Most standard 36V e-bikes, folding bikes, portable power tools.
Features: Universal, easy plug-and-play.

8mm (Xiaomi-style) Connector
For: Selected 36V e-bikes, balance scooters, EU/US special models.
Features: Large contact area, stable high-current connection.

Troubleshooting

No LED / no charging: Check power socket, connection, or cable damage.
Charging too slow: Check connector contact, battery compatibility.
Overheating: Improve ventilation; stop overloading.
No response after connection: Check polarity, battery over-discharge protection.