Futurebatt 8.0Ah 24V Battery Replacement for Greenworks 24 Volt Lithium Lawn Mower Battery 29842 29852 LB24A020 for Greenworks Trimmer Weed Blower

What It Is

This is an 8.0Ah 24V lithium-ion replacement battery for Greenworks 24V cordless outdoor equipment—specifically lawn mowers, trimmers, weed blowers, and other tools in that voltage platform. It’s a higher-capacity drop-in alternative to the standard 2.0Ah-4.0Ah batteries, designed to extend runtime for larger yards or heavier use.

Fitment & Compatibility

Check before buying:

• Voltage: Must be 24V (not 40V or 80V). This battery only works with Greenworks 24V tools.
• OEM part numbers: Directly replaces Greenworks 29842, 29852, and LB24A020. Also compatible with many older 24V packs (e.g., 29462, 29502).
• Physical size: Measures roughly 5.5 x 3.5 x 4 inches. It fits all standard Greenworks 24V slide-on battery ports—no adapter needed.
• Tools: Works with 24V mowers (e.g., 25302, 25142), trimmers (e.g., 21262), blowers (e.g., 24312), and hedge trimmers. Not compatible with 40V or 80V tools.
• Mower deck size: No restriction—fits any Greenworks 24V mower regardless of cutting width.

What to verify: Look at your original battery’s part number (usually on a sticker). If it ends in 842, 852, or A020, this is a direct fit. If unsure, measure the battery slot—this is the same width as all Greenworks 24V packs.

Key Things to Know

• Capacity vs. OEM: 8.0Ah is double the typical 4.0Ah OEM pack. Expect 30-50 minutes of mowing on a 16-19 inch deck, vs. 15-25 minutes with a 4.0Ah.
• Installation: Takes 2 seconds—slide on until it clicks. No tools, no wiring.
• Build quality: Aftermarket; some users report slightly shorter lifespan than Greenworks OEM. The 3.7-star average reflects occasional early failure (dead cells after 6-12 months). Check return policy.
• Charger compatibility: Works with any Greenworks 24V charger (stock or aftermarket). Charging time: ~2-3 hours from empty.
• Common gotcha: The battery may be slightly heavier than OEM (about 1.5 lbs vs. 1.2 lbs). It won’t affect balance on mowers but is noticeable on handheld tools.

Should You Buy It

Buy this if you need a low-cost spare or upgrade for a Greenworks 24V mower or trimmer and are comfortable with aftermarket batteries. It’s a good budget option for occasional use or as a backup, but if you rely on the tool daily or need maximum reliability, stick with Greenworks OEM (around $50-60). For the price, it’s a solid runtime boost for larger yards.