The Milwaukee 18v M18 Li-ion 12.0Ah REDLITHIUM-ION High Output Battery pack features smarter electronics for better power control against the 9v model.

The M18HNRG-121 also provides 50% more power than standard REDLITHIUM Batteries.

Features and Benefits:

• REDLINK PLUS™ intelligence system delivers an advanced digital overload protection for tool and battery and uniquely enhances the tool performance under load
• REDLITHIUM-ION™ battery pack provides superior pack construction, electronics and fade-free performance to deliver more run time and more work over pack life

Also Comes with charger.