Long Lasting AA Rechargeable Batteries: 3145mWh high-capacity rechargeable lithium AA batteries can be charged up to 1200 times, saving you money and reducing waste. Long-lasting for everyday use. Featured low self-discharge: After 1 year of storage, the batteries still have 85% capacity. Easy charging with convenient Type-C charge port: Included the 4-in-1 USB-A to USB-C charging cable. You can charge 4 batteries simultaneously or individually, just plug it into a laptop, power bank, wall charger or car charger. 1.5~2 hours Fast charging, and LED indicator light blinks when charging and goes solid when finished. Safe and Efficient: Built-in safety protection against overcharging, over-discharging, over-current and short-circuit. Advanced explosion-proof and leak-proof. Widely use: These lithium AA batteries provide consistent 1.5V output for reliable performance. Suitable for flashlights, headlamps, toys, remote controls, radios, bike lights and other household devices. Charging method: Pleae insert the charging cable plug from the right to the left into the battery charge port. Note: The battery is not fully charged when it leaves the factory. Please fully charge it before use. 4 pack high capacity AA lithium batteries, charge over 1200 time with 4-in-1 charging cable.