3.7V rechargeable battery capacity:500mAh,600mAh,700mAh High operating voltage:3.7V Cycle ... operating voltage 3.7V Li-ion rechargeable battery.2)Product description:ICR16340 Lithium-ion battery with capacity:500mAh,600mAh,700mAh.3)Light weight ... notebook computer, digital products, mobile phone etc 3.7V rechargeable battery 16340