Flylinktech Replacement Battery for Milwaukee M12 12-Volt Lithium Li-ion Coldless Tools Battery For Milwaukee 48-11-244048-11-2402 M12 Flylinktech professional replacement battery,30 days money back Provides optimized performance and overload protection. Fuel gauge onboard: Displays remaining runtime for less downtime on the job. All-weather performance: Delivers power in extreme jobsite conditions. Versatility: Powers most Milwaukee M12TM cordless power tools.