Sometimes you don't need the brute strength of a higher voltage cordless tool. It ends up being more effort than it needs to be when you are only doing light tasks. Milwaukee 2.4 Volt cordless tools have just the right amount of power to get those small jobs done and are super portable and lightweight. The 2.4 Volt batteries that power these tiny tools are great, with a quick 1 hour recharge and zero memory effect so you get full power throughout a charge. These convenient batteries work with the 6540-1 and 6545-6 screwdrivers, 6550-20 caulking guns as well as other 2.4 Volt Milwaukee and some AEG cordless tools.