The Vapir NO2's battery
can last about 2 - 3 user hours on a full charge. Having a second or third rechargeable battery comes in handy when your out and about and there is no place to plug in and recharge. When combined with the External Battery Charging Cord the extra Vapir NO2 Replacement Battery
can be charged without actually being in the NO2 unit.
More from this brand: Vapir