Key Features:

✔ Battery Cells: 1 x 21700 cells.
✔ Capacity: 3.6V, 5,000mAh.
✔ USB-C Rechargeable.
✔ USB-C Input: 5V/2A.
✔ Compatibility: ALLTY 1500S.

3.6V 5000mAh capacity battery pack for ALLTY 1500S bike light, with USB-C charging port. It can be charged independently or with the headlight.