Description BATTERY RUNTIME: The battery provides about 60% greater runtime than standard AA batteries. COLD WEATHER OPERATION: The battery continues to work in low temperatures. POWER FLEXIBILITY: The battery provides a Li-ion option instead of AA alkaline batteries. USB-C CHARGING: The USB-C charging allows the ability to charge the battery using various 5V power supplies, such as power adapters, PCs, laptops or portable power banks, for maximum flexibility. CONTINUOUS CHARGING: The battery can remain in the laser and can be used while charging.