DHRUV-PRO 3.7V 1200mAh ICR18650 Lithium Rechargeable for Flashlight LED Light Headlight Battery

18650 Li-ion battery is a lithium-ion rechargeable battery and is used in high drain applications due to its superior capacity and discharge rate. The first 4 digits of 18650 indicate its dimension, i.e. 18mmx65mm, and the last 5th digit indicates its shape, i.e. cylindrical. Li-ion batteries can usually boost a 300-500 charge cycle. Features Small size and easy to use Great capacity and discharge rate Long life Specification Minimum capacity: 1200mah Typical capacity: 1210mah Internal impedance: <1 ohm Standard voltage: 3.7V Overcharge voltage: 4.18V Over discharge voltage (under a constant load of 11.4Ohm/500mA) 0.01V voltage drop/3-min 0.2V voltage drop/60-min Final discharge voltage: 1.2V-3.73V = 2.53V (3.73V dropped to 2.53 in < 48 hrs max) S