14500 AA 3.7V Li-ion 800 mAh battery with protection

Diameter: 1.44 cm Height: 50.5 mm Battery capacity: 800 mAh Number of batteries included: 1 pc(s) Battery voltage: 3.7 V Battery technology: Lithium-Ion (Li-Ion) Battery type: Rechargeable battery Warnings: Do not dispose of used rechargeable batteries in the regular waste bin.