Featuresr small size portable and lightweight the phone charger is primarily designed for emergency use you can carry it to anywhere you wantr no need to be charged it only needs two batteries5aa batteries5 rechargeable batteries which are easy to get from store or household very convenient to charge your smartphoner built in protection circuit if the aa batteries are exhausted or the devicelike phone has been charged fully it will be disconnected by itself and stop chargingr a