EagleTac 2600mah 18650 Lit-ion Rechargeable Battery is suitable for all flashlights that use this type of rechargeable battery, it can be recharged using any charger suitable for 18650 battery which can be found in our battery section. It has over charge and under charge protection built into the battery and can be recharged 400-500 times before needing to be replaced. These batteries have no battery memory so they can be recharged at any level of run down without damaging the battery. The protruded button top design makes it work with any flashlight that incorporates hardware anti-reversed battery polarity protection. It also ensures conductivity when multiple batteries are used in serial.