This useful innovative and unique battery charger will recharge up to 4x aa 4x aaa rechargeable batteries or a mixture of the two at any one time thanks to its independent charging feature you dont even need to charge the same make of battery at the same time as this clever little device will charge any make or model of aa or aaa battery simultaneously aa rechargeable batteries can be inserted straight into the unit whilst aaas can be used via the included adaptors if you wish to rech