The newest Milwaukee 18V Lithium-Ion Battery works on the M18 Cordless Tool System and has 2.0 Amp Hours of run-time. This battery powers over 40 Milwaukee M18 cordless tools. Milwaukee's M18 REDLITHIUM 2.0 provides up to 2X more run-time, 20% more power and 2X more recharges than a standard Lithium-Ion battery. REDLITHIUM 2.0 also delivers best-in-class performance in extreme job-site conditions. With Milwaukee durability built into each pack, the REDLITHIUM 2.0 battery operates cooler and performs in climates below 0 F/-18 C with fade free power.