Milwaukee Cordless Power Tools June 17, 2019 NOT ALL LITHIUM-ION BATTERIES ARE CREATED EQUAL.REDLITHIUM™ batteries last longer, think faster and work harder than all other professional lithium-ion batteries. Milwaukee's exclusive integration of chemistry, pack design and circuitry come together for superior output in the harshest environments. REDLITHIUM™ batteries deliver more work over the course of your day and over life of the battery. Back To Blog