The CEENR 5Ah battery is a drop-in replacement for Craftsman 20V Max tools — it replaces the CMCB201 series and the full Craftsman 20V Max slide-pack family, built with premium high-drain cells and 4-layer BMS protection. At 5Ah it delivers far longer runtime than the smaller packs most tools ship with — ideal for contractors, remodelers and serious DIYers who run drills, saws, grinders and impact drivers through a full workday. It charges on your existing Craftsman charger, carries a 3-year warranty, and ships from a US warehouse — fewer battery swaps, no mid-cut downtime, and a fraction of the cost of a genuine OEM pack.