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CP vs XC vs Forge: What every Milwaukee M18 battery label actually means

Don't get confused by all the different battery packs.
SlashGear

Milwaukee M18 Resistant Battery Vs. Regular: What's The Difference?

Milwaukee has a few different battery systems that power its cordless tools. There are the M12, MX, and the very popular M18 tool systems, with each system in turn offering several different batteries ...