MORE RUNTIME. LONGER LIFE. FASTER CHARGING. REDLTIHIUM USB 3.0AH Battery delivers up to 20% more capacity to Milwaukee USB Rechargeable solutions compared to the 48-11-2130 REDLITHIUM USB Battery. With more capacity, get longer runtime or more power for performance in every Milwaukee USB Rechargeable solution. Eliminate the need for disposable batteries with more charges for longer life out of single battery. Get back to work faster with 3X faster charge times when charged by a Milwaukee USB Rechargeable product or the REDLITHIUM USB Portable Power Source & Charger. The Milwaukee REDLITHIUM USB 3.0AH Battery is covered by a 2 year warranty. Milwaukee 48-11-2131 REDLITHIUM USB 3.0AH Battery