4 x AA Ni MH (Nickel Metal Hydride) 2450m Ah/1.2V rechargeable batteries High power rechargeable batteries Replaces standard AA batteries Overcomes 'memory effect' problems associated with Ni-Cad batteries Ideal for high power consumption devices such as toys, torches & personal stereos AAA 4 Pack also available Ideal for use with our Duracell Simply 4 Battery Charger.