Ultimate Arms Gear 20 Pack CR123A 3V 1200 mAh Lithium Rechargeable Batteries Battery For ULTRAFIRE Flashlight Light Includes 20 High Capacity Lithium-Ion Batteries (3.0V 1200mAh) CR123A Batteries. Rechargeable CR123A Li-Ion Batteries with 3.0V average working voltage (4.5V at peak without load). Replaces most of CR123A primary Lithium battery for digital cameras and flashlights. Open circuit voltage (3.0V) is much higher than primary Lithium battery (3.0V). It may burn certain bulb of flashlight. Please make sure your device can accept 4.5V voltage before use. PLEASE READ PRODUCT DESCRIPTION BELOW BEFORE PURCHASE TO ENSURE IT WORKS FOR YOU