The DEWALT 12V MAX 5Ah Lithium-Ion Battery 2-Pack provides extended runtime and the convenience of a backup battery for continuous work with your 12V MAX tool system. Each 5Ah battery delivers significantly more runtime than standard batteries, reducing interruptions on the job. Compatible with all DEWALT 12V MAX tools, these batteries feature a built-in 3-LED fuel gauge for instant state-of-charge feedback. The compact, lightweight design keeps your 12V MAX tools nimble and easy to handle.