Our Redlithium USB 3.0 AH Battery provides more runtime， longer life， and faster charging. This USB 3.0 battery pack delivers up to 20 percent more capacity for Milwaukee USB Rechargeable solutions compared to the First Generation Redlithium USB Battery (48-11-2130). With higher capacity， users get longer runtime and more power for performance in every Milwaukee USB Rechargeable solution. Eliminate the need for single-use batteries with these USB rechargeable batteries that deliver more charges for longer life out of a single battery pack. You'll get back to work faster with faster charging times when using a Milwaukee USB Rechargeable product or the Redlithium USB Portable Power Source and Charger (48-59-2012).