When runtime is non-negotiable on the job site, the Milwaukee M12™ REDLITHIUM™ XC 4.0Ah Extended Capacity Battery Pack (Model 48-11-2440) is the upgrade professional electricians and contractors rely on. Delivering up to 2X more runtime, 20% more power, and 2X more recharges than standard lithium-ion packs, this battery keeps your M12 tools running through demanding rough-in work, panel installations, and finish electrical — without the downtime. Built to perform in extreme Canadian job-site conditions, including temperatures below -18°C, it's the dependable power source that DIYers and seasoned tradespeople trust to get the job done right.

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