M12 Redlithium 4.0 AMP Extended Capacity Battery

Delivers up to 2X more runtime, 20% more power and 2X more recharges than standard lithium-ion batteries. The M12 REDLITHIUM XC4.0 Extended Capacity Battery Pack features superior pack construction, electronics and performance to deliver more work per charge and more work over pack life than any battery on the market. It offers 4.0 amp-hours of runtime.