Hailong Style Downtube Battery

Design Type

Lithium-ion battery pack with PC+ABS flame-retardant casing and slide-in assembly design. Approximate dimensions: 120×105×70mm. Rated energy approx. 378Wh, composed of 36V nominal voltage and 10.5Ah capacity.

BMS Protection Functions

Built-in BMS (Battery Management System) provides:

Overcharge protection (charge overvoltage trip at 4.25V±0.05V)

Over-discharge / undervoltage protection

Short circuit protection (automatic cut-off within 5ms)

Temperature protection

Overcurrent protection during discharge (triggers above 50A)

Balanced charging function

Advantages

Highly versatile, compatible with the vast majority of mid-drive motor systems and hub-motor e-bikes under 500W. The battery base can be fixed to the downtube water bottle bosses using M5 hex socket screws, then the battery slides in and locks (key provided). The BMS monitors battery status in real time and displays dynamic charge level via LED indicators on the base or on the handlebar display.

Application Scenarios

Ideal for city commuting and leisure e-bikes with ample downtube space. Features quick removal and portable outdoor charging.