FLAGPOWER 12V 4.0Ah Lithium-ion Cordless Tool Replacement Battery for Milwaukee 48-11-2411 M12 REDLITHIUM 12-Volt Cordless Milwaukee Tools 12V Milwaukee M12 Lithium-ion Battery Battery Type: Li-ion, Voltage:10.8V/12V, Capacity: 4000mAh; Compatible with MILWAUKEE M12/48-11-2411 and Radios. Longer Lasting&Battery Safety - Charging at any time will have no effect on the battery, holds a charge for up to 500 days;Integrated microchip prevents overcharging & lengthens battery life & No memory effect Environmental Protection - No lead or mercury, environmentally friendly. Battery Guarantee - Products are CE certified!Real Capacity Guarantee! Warranty Guarantee!30 days money back! Exercise the Battery - Do not leave the battery dormant for long periods of time. We recommend using the battery at least once every two to three weeks. If you don't plan on using the Power Tool Battery for a month or more, store it in a clean, dry, cool place away from heat and metal objects. Ni-Cd, Ni-MH and Li-ion batteries will self-discharge during storage; Remember to recharge the batteries before use.