Model Number: 18650 Set Type: Battery Only Nominal capacity: 1800mAh Type: Li-Ion Size: (D) * 18.3mm (L) 65mm Storage temperature: -20 ~ 60 ℃ (1 month), - 20 ~ 45 ℃ (3 months), - 20 ~ 20 ℃ (1 year) Color: Blue Use: Electric tools, electric car batteries Other civilian electronic equipment Flashlight Portable fan Note: The battery is safe and of good quality, the capacity is real. ***Recommendations*** Before using, you should charge the battery first for about 3-4 hours in order to stimulate the battery to be more efficient.