4100mWh Rechargeable Lithium AA Batteries 4 Pack, 1.5V USB Double A Lithium-ion Batteries AA Size, Long Lasting 1200 Cycles, High Capacity Battery for Toys, Flashlight, Smart Door Lock

4100mWh High CapacityINSZIII lithium-ion battery has a high capacity of up to 4100mWh with a constant 1.5V voltage, providing more stable power and longer operating time, perfect for high-drain devices, like cameras, handheld games, flashlights, smart door locks, doorbells, and smart home gadgets.
USB-C Charge DesignThese AA batteries are easily charged with a 4 in 1 USB-C cable, eliminating the need for a charger and adapter, and can be fully charged in approximately 2.5 hours. Built-in LED shows the charging process, with a flashing green light indicating charging and a solid green light indicating full charge.
Over 1200 CyclesThe rechargeable AA lithium-ion battery has 1200+ cycles, no memory effect, can be charged at any time, will help you save big money and save time compared with single-use batteries, which are very convenient and reliable.
Multiple Safety ProtectionBuilt-in integrated safety circuit to ensure safe operation. When the battery is fully charged, it will automatically stop charging, effectively preventing overcharging, overcurrent, overvoltage, overheating, and short circuit.
Energy-Saving BatteryLoving the environment starts with rechargeable Li-ion AA batteries, which save thousands of alkaline batteries and reduce landfill waste.