This charger is compatible with both CR2 and CR123A batteries. It can be used repeatedly, making it very economical. As shown in the image, it can charge two batteries simultaneously. This page includes 4 CR123A batteries, but CR2 and CR123A batteries are also sold separately. If you wish, please contact us via message. ※The batteries that can be used with this product are dedicated batteries, so do not use any other batteries! 【Charger Product Specifications】 Compatible Battery Standards: CR2/CR123A Input: micro USB 5V/1A Output: 3.65V 140mA Size (approx.): 85mm (H) x 42mm (W) x 30mm (D) Weight (approx.): 40g Set Contents: Charger / microUSB cable / CR123A x 4 【CR2 Product Specifications】 Capacity: 300mAh Voltage: 3V 【CR123A Product Specifications】 CR123A Nominal Capacity: 600mAh Minimum Voltage: 2.0V Operating Voltage: 3.0V〜3.2V Peak Voltage: 3.65V Maximum Discharge Value: ＞600mA Maximum Charging Current: ＜600mA Discharge Cut-off Voltage: 2V ※Do not discharge below 2V. Maximum Charging Current: 3.3A ※Always set the charging cut-off voltage to 3.65V when charging. Size (approx.): 33.5mm (H) x 16.5mm (diameter) Weight (approx.): 16.5g Cheki (Instant Camera) Toy Camera Golf Rangefinder Camera, Camera Accessories Digital Camera Laser Pointer LED Light Hearing Aid Security Sensor Flashlight Smoke Detector Flashlight Headlight Wireless Communication Devices Toys microUSB USB Charging