Acebeam 21700 Rechargeable Battery - 15A - 5100mAh

Features:

500 Recharge Cycles
5000 mAh Capacity
Lithium-ion rechargeable
Multiple Layers of protection
Pressure Relief Valve Protection
Separate Microporous Protection
Overcharge, Over-discharge, Short Circuit, and Overheat Protection
Continuous Discharge Current 15A MAX
Steel Shell Riveting
3.6V Charging Current: 2A recommended, 3A Maximum

Warning:
Never expose the battery to water or fire.
When charging or using batteries, ensure the positive and negative ends correspond with the  positive (+) and negative (-) symbols.
To extend battery life it is recommended that it is charged every three months or longer when unused for long periods.
Keep out of the reach of children.