The product is new. This is the price for two batteries. It has a built-in protection circuit. Dimensions: 69mm (length) x 18.2mm (outer diameter) Nominal voltage: 3.7V, Nominal value: 2600mAh This product complies with the Electrical Appliance and Material Safety Law enforced by the Ministry of Economy, Trade and Industry. We also conduct full inspections. PSE mark is indicated. (Products listed without the PSE mark are illegal. Please be careful as they are dangerous.) - The maximum capacity of 18650 lithium-ion batteries is 3500mAh. 18650 rechargeable batteries sold with a higher capacity may have a different actual capacity. If the capacity is low, the lighting time will be shorter. Please be careful. - 18650 2600mAh with protection circuit. Prevents over-discharge and overcharge. Safe and secure to use due to the protection circuit. As a result of measuring 18650 batteries sold elsewhere, the capacity was not as stated. If the capacity is low, the lighting time will be shorter. <Options> If you want to change the batteries or order additional ones, please comment before purchasing. The purchase process will follow after the price change. - Change to 3000mAh battery +260 yen - Change to 3400mAh battery +980 yen By changing the battery capacity, the lighting time of the light will be longer in proportion to the capacity. - We also sell a rapid charger that charges rechargeable batteries via USB. Built-in overcharge protection circuit (safe and secure) (If you charge a lithium-ion rechargeable battery with a charger that does not have an overcharge protection circuit, there is a risk of explosion. Please be careful.) Size: Total length 105mm x width 50mm x height 28mm, weight approx. 73g Input: 5V 1A Output: 4.2V 1A Input terminal: USB port USB-microUSB cable: 80cm +380 yen. A90864