Upgraded！6500mAh Replacement for Kobalt 24V Battery KB624-03 KB524-03 KB424-03 KB224-03 KB124-03 Compatible with Kobalt 24V max Battery

What It Is

This is an upgraded 6500mAh aftermarket replacement battery for Kobalt 24V max cordless lawn mowers, string trimmers, blowers, and other 24V outdoor power tools. It offers higher capacity than the original 4000-5000mAh batteries, extending runtime for larger yards or heavy-duty use.

Fitment & Compatibility

Check these before buying:

• Model numbers: Directly replaces Kobalt KB624-03, KB524-03, KB424-03, KB224-03, and KB124-03 batteries.
• Tool compatibility: Works with any Kobalt 24V max tool or charger that accepts the standard Kobalt 24V slide-on battery platform (rectangular with side rails). Not compatible with older Kobalt 18V or 40V systems.
• Physical fit: Dimensions are identical to OEM; fits all Kobalt 24V mowers, trimmers, blowers, and chainsaws. No modification needed.
• Charger: Use with any Kobalt 24V max charger (sold separately). The battery will charge normally, but charge time may be longer due to higher capacity.
• OEM vs aftermarket: This is a third-party battery, not Kobalt-branded. It may lack some safety certifications (UL, ETL) found on OEM units.

Key Things to Know

• Installation: Zero difficulty – slides on and off like the original. No tools required.
• Runtime: 6500mAh provides ~30-50% more run time than a standard 4Ah Kobalt battery, ideal for mowing 1/4+ acre yards.
• Quality note: Aftermarket batteries may have slightly shorter overall lifespan (fewer charge cycles) than OEM, but user reviews (4.7/5) suggest good performance for the price.
• Common gotcha: The higher capacity means heavier weight (~1.5 lbs vs ~1 lb for 4Ah). This may be noticeable on handheld tools like trimmers; fine for mowers.
• Warranty: Typically 1-2 years from seller, not covered by Kobalt’s warranty.

Should You Buy It

Buy this if you need a budget-friendly spare or replacement for your Kobalt 24V tools, especially for a mower where extra runtime matters and weight isn’t a concern. Skip it if you prioritize OEM safety certifications, longer cycle life, or a lighter battery for handheld tools.