iTEKIRO 2.4V 3000mAh Ni-MH Battery for Milwaukee 48-11-0100, 6538-1, 6539-1, 6539-6, 6545-6, 6546-1, 6546-6, 6550-20 + iTEKIRO Mini Speaker Replacement power tool battery for Milwaukee 6538-1, 6539-1, 6539-6, 6545-6, 6546-1, 6546-6, 6550-20 High capacity battery lasts longer: 2.4V, 3000mAh, Ni-MH Made with premium quality cells to meet or exceed the OEM specifications Manufactured by advanced technology of battery power management and protection circuitry Satisfaction guarantee with 1 year replacement warranty