Greenworks 40V 4.0Ah Lithium-Ion High-Power Battery
4.3Best price now
$127.99at AmazonObserved at 12:11 AM
27% under what the other stores charge
Compared across 5 stores. Prices are checked against each store and labelled with when.
27% under what the other stores charge
Compared across 5 stores. Prices are checked against each store and labelled with when.
This is a spare or replacement 40V lithium-ion pack for Greenworks G-MAX tools, rated 4.0Ah and 144Wh. It fits more than 75 Greenworks 40V tools, from trimmers and blowers to mowers, and has an integrated 4-LED fuel gauge plus overcharge and overdischarge protection. It charges in about 120 minutes on a 40V charger, which is sold separately. At $127.99 at Walmart as of November 4, 2026, it sits at the low end of its recent range across the 5 stores listing it new.
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Lowest price we've seen: $127.99 on Nov 4 at Amazon. Tracked across 5 stores since Nov 4.
Rated 4.3 out of 5 from 26 ratings. Owners generally report the pack holds up across mowing and trimming seasons and fits their existing Greenworks tools. Complaints center on charge time and price relative to smaller packs.
Engineered for weekly yard maintenance, the 40V series balances endurance with everyday usability. Reliably trims hedges, mows mid-sized lawns, and clears leaves through multiple seasons. The streamlined battery system works across trimmers, blowers, and mowers, minimizing tool swaps during weekend chores. For those transitioning from gas to electric, this platform offers familiar performance with cleaner operation.
