The energizer 1hr battery charger plus 4x aa 2300mah is the ideal fast battery charger you can use it at home or take it with you wherever you gorrfeaturesr charges up to four aa or aaa batteries in just one hourr charges batteries at home and in the carr led charge light tells you when batteries are chargingr worldwide voltage makes it the perfect travel charger to take on trips abroadr the energizer 1 hour charger is also energy star certified r 4x aa 2300mah cells included