The REDLITHIUM™ USB Battery 3.0Ah provides users with maximum runtime, long life, and fast charging. The USB Battery 3.0 delivers more capacity for Milwaukee USB Rechargeable solutions than the REDLITHIUM™ USB Battery (L4B2). With this higher capacity, users get maximum runtime and more power for performance in their MILWAUKEE® USB Rechargeable solutions. The L4B3 eliminates the need for disposable batteries, with these USB rechargeable batteries delivering more charges for longer life out of a single battery pack. The user will be back to work faster with fast charging times when using a Milwaukee USB Rechargeable product or the REDLITHIUM™ USB Portable Power Source & Charger Kit (L4PPS-201, sold separately). The REDLITHIUM™ USB Battery 3.0Ah is covered by a 2 year warranty.