TheM18™ 5.0AH REDLITHIUM-ION™ BATTERY features superior pack construction, electronics, and performance to deliver more work per charge and more work over the life of the pack than any battery on the market. M18™ 5.0AH REDLITHIUM-ION™ BATTERY features an advanced design, protecting the pack against harsh jobsite environments. This protection routes water away from the electronics and out of the battery pack, extends run-time and life by minimizing heat, and prevents pack failures from vibration or drops. This unique to Milwaukee® design also allows the battery to operate in extreme cold weather conditions (below OoF/-18oC). Managed by Milwaukee’s exclusive REDLINK™ Intelligence, the battery features overload protection to prevent you from damaging your cordless power tools in heavy-duty situations, while the discharge protection prevents cell damage. It also provides full system compatibility with 60+ M18™ cordless solutions. Upgrade to the M18™ 5.0AH REDLITHIUM-ION™ BATTERY to instantly increase the run-time and durability of your M18™ cordless tools.