Replacement for Kobalt 40V Battery 6.0Ah Compatible with All Kobalt 40V Cordless Power Tool, for 40V Max Battery KB440-03 KB2540C-06 KB240-03 KRC60 | Fast Charging & Extended Runtime

What It Is

This is a replacement 6.0Ah lithium-ion battery for any Kobalt 40V cordless tool, including lawn mowers, trimmers, blowers, and chainsaws. It provides extended runtime and fast charging capability for medium-to-heavy yard work sessions.

Fitment & Compatibility

• Voltage & Platform: Only works with Kobalt 40V Max tools. Not compatible with 24V, 80V, or other brands.
• Model Numbers: Directly replaces OEM batteries KB440-03, KB2540C-06, KB240-03, and KRC60. Check your original battery’s model number printed on the label.
• Physical Fit: Same slide-in mounting design as all Kobalt 40V batteries. Fits any Kobalt 40V tool or charger (including the KRC60 rapid charger).
• What to Check Before Buying: Verify your tool is 40V Max (not 40V standard or 40V XC). Look for a flat, rectangular battery with a slide-on rail—this is the standard form factor. If your tool takes a different battery shape (e.g., backpack or stick-style), this won’t fit.

Key Things to Know

• Aftermarket vs. OEM: This is an aftermarket replacement, not a Kobalt original. It may have slightly less runtime or charge cycles than OEM, but it’s significantly cheaper.
• Installation: Zero difficulty—slide onto tool until it clicks. No tools or wiring needed.
• Charging: Works with any Kobalt 40V charger. Expect 45–60 minutes to full charge from empty on a standard charger; faster on a rapid charger (KRC60).
• Common Gotcha: Some users report the battery indicator lights may not match OEM exactly. Also, if stored fully discharged for months, it may not accept a charge—store at 50% charge in a cool, dry place.

Should You Buy It

Buy this if you need a budget-friendly spare or replacement for your Kobalt 40V lawn mower or trimmer and don’t want to pay OEM prices. It’s a reliable option for light-to-medium use, but if you need maximum durability or warranty support, stick with Kobalt’s own battery.