Maximize the performance of your 12 V MAX tools with the DeWALT 12 V MAX 5 Ah battery. At more than triple the capacity of original 12 V MAX batteries (DCB120), this unit provides extended runtime when used with all 12 V MAX tools while retaining a light-weight, compact design With the built-in fuel gauge three LED charge indicator, you'll always know when your battery is ready for work.