Nitecore RCR123A/16340 Li ion battery 650mAh (NL166) Description: Nitecore RCR123A Li-ion battery (650mAh) (single battery) Features: Nitecore RCR123A Li-ion battery (650mAh) 650 mAh 3.7V 2.4Wh Intergrated battery overcharge/discharge protection circuits High discharge performance Li-ion rechargeable battery More than 500 charge-discharge cycles Internationally insured by PICC Property and casualty company ltd