The Milwaukee M18B4 4.0Ah Red Lithium-ion battery has up to 2x more run time than standard batteries. Delivers up to 2X more runtime, 20 percent more power and 2X more recharges than standard lithium-ion batteries. The M18 Redlithium XC 4.0 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.
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