3000mAh Replacement for Black and Decker 40V Lithium Battery LBX2040 LBXR36 LBXR2036 LST540 LCS1240 LST136B LST540B LST140C LCSB2140 with LCS40 Charger Replace for Black and Decker Battery Charger

What It Is

This is a 3000mAh aftermarket lithium-ion battery replacement for Black+Decker’s 40V MAX cordless lawn mowers, string trimmers, leaf blowers, and chainsaws. It powers the same tools as the OEM LBX2040, LBXR36, and LBXR2036 batteries.

Fitment & Compatibility

• Models that work: LST540, LCS1240, LST136B, LST540B, LST140C, LCSB2140, and any 40V Black+Decker tool that uses these battery packs.
• Charger compatibility: Works with the LCS40 charger and other genuine Black+Decker 40V chargers.
• Physical check: Measure your existing battery – this unit is roughly 5.5 x 3.5 x 2.5 inches. If your OEM battery slides in and clicks, this will too.
• OEM vs aftermarket: This is not a Black+Decker part. It will fit mechanically but may have slightly different plastic molding.
• Voltage & capacity: 40V nominal, 3000mAh (same as LBX2040). Higher capacity than the LBXR36 (2600mAh) and LBXR2036 (2000mAh).

Key Things to Know

• No installation needed – just slide it into the tool until it clicks. No screws, wires, or modifications.
• Capacity difference: 3000mAh gives about 30–40% more runtime than a standard 2000mAh pack. Real-world runtime depends on load and temperature.
• Quality variance: Aftermarket cells may degrade faster than OEM. Check that the replacement includes a built-in BMS (battery management system) for overcharge/over-discharge protection – most do, but confirm in the listing.
• Warranty note: Using a non-OEM battery may void the warranty on your Black+Decker tool. For older out-of-warranty tools, this is a non-issue.

Should You Buy It

Buy this if you have an older or dead Black+Decker 40V tool (out of warranty) and want a cheaper, higher-capacity replacement than the OEM LBX2040. It’s a solid budget option for light-to-medium yard work, but if you need maximum reliability or run heavy-duty daily use, stick with genuine Black+Decker.