Genuine vs Aftermarket Cordless Batteries: The Honest Truth

A genuine pack from Milwaukee, DEWALT, or RYOBI is our evidence-backed default. Its exact model, platform claims, and warranty can be checked against the manufacturer. A lower price or live marketplace listing does not establish an aftermarket pack's cell quality, protection behavior, fit, or safety. We do not bench-test cells, so we suppress third-party identities that lack attributable manufacturer or independent evidence instead of turning uncertainty into a recommendation.

Cordless batteries are not just cells in a case. A genuine pack has an attributable manufacturer, a published compatibility boundary, and model-specific support terms. In this catalog, Milwaukee's reviewed batteries carry either 2- or 3-year battery warranties depending on model; the reviewed DEWALT and RYOBI packs carry 3-year limited warranties. Charger terms differ by exact model, so verify the current manufacturer warranty page rather than assuming one duration applies to a whole brand.

We found live third-party offers, but no attributable primary source or independent testing that established their exact fit, cell quality, protection behavior, or safety. Star ratings and seller copy do not close that evidence gap. Until a specific model has credible, model-level evidence, BatteryFits archives its identity for transparency but does not surface it in recommendations, compatibility results, or purchase exits.

An aftermarket pack is not covered by the tool manufacturer's battery warranty, and its effect on tool coverage depends on the written warranty and failure circumstances. A working Amazon listing and good star rating are not proof of compatibility or safety. We have not tested the suppressed packs and found no primary or independent evidence sufficient to certify their cell quality or protection behavior.

Choose an exact genuine model whose platform and warranty are documented by the manufacturer. Treat physical fit as only one check: confirm the exact platform, model exclusions, charger family, and current safety notices before buying. Compatibility is not a safety endorsement, and unsupported third-party packs are not current BatteryFits recommendations.