Kemjio 40V 4.0Ah Replacement Battery for GreenWks G-MAX – LED Indicator, Protection Circuit

Kemjio's 40V 4.0Ah replacement battery delivers a reliable power boost for GreenWks G-MAX 40V tools, restoring runtime and compatible with many model numbers including 29472 and 29462.

If your cordless mower, trimmer, blower, or chainsaw is running short on runtime or you need a spare battery for back-to-back jobs, this Kemjio 40V 4.0Ah battery is built to step in. It matches the voltage and form factor of GreenWks G-MAX 40V packs and uses high-quality cells with built-in protection circuitry and a clear LED status indicator. The pack is designed for everyday yard work—lawn mowers, hedge trimmers, blowers, string trimmers, pole saws, and several other 40V tools from the GreenWks ecosystem.

Which GreenWks tools will this Kemjio battery work with?

This battery is compatible with a broad range of GreenWks 40V G-MAX system products. It fits machines that accept the same 40V pack form and lists cross-reference part numbers used by GreenWks for their batteries.

• Confirmed compatibility with GreenWks battery part numbers like 29472, 29462, 2901319, 29252 and others.
• Fits cordless mowers such as 25232/25322/25302 style 16–20" models and dual-port brushless mowers.
• Works with blowers, hedge trimmers, string trimmers, pole saws, chainsaws, cultivators, and select snow throwers in the 40V lineup.

How long will a single charge run my tool?

Runtime depends on the tool type, load, and cutting conditions. A 4.0Ah pack gives moderate-to-long runtime on mid-demand tasks and shorter runtime under heavy load like thick brush or continuous heavy mowing.

• Light trimming and edging: several tens of minutes per charge.
• Medium-demand jobs (typical lawn mowing): likely one full yard or more depending on mower efficiency and blade sharpness.
• High-demand tasks (chainsaw or heavy brush): expect considerably reduced runtime; keep a spare pack for continuous work.

What safety and charging features does this replacement have?

The Kemjio pack uses quality cells and integrated protection circuits to help prevent overcharge, over-discharge, and short-circuit conditions. It also includes an LED charge indicator so you can quickly check remaining capacity before starting a task.

• Overcharge and over-discharge protection built into the battery management system.
• Rapid-charge capable when used with compatible GreenWks chargers; follow charger specifications for best life.
• LED battery status indicator gives a quick visual of charge level.
• Storage guidance: avoid heat, dampness, and direct sunlight; cycle charge monthly during long storage.

Will this replace original GreenWks battery packs directly?

Yes—this Kemjio 40V 4.0Ah battery is designed as a direct-fit replacement for many GreenWks part numbers and tool models, provided the tool accepts the same 40V G-MAX style pack. Confirm your tool’s model or existing battery part number against the compatibility list before purchase.

• Compatible replacement numbers include commonly used GreenWks part codes listed by the manufacturer.
• Not suitable for 21" lawn mower model MO40L02 (double-check model compatibility).
• Fits most GreenWks 40V tools that accept 29472/29462 style packs—verify fit visually if unsure.

Who is this for? Homeowners and pros who use GreenWks 40V G-MAX cordless tools and need dependable runtime without buying an entirely new tool. This battery is suitable as a spare for longer jobs, a direct replacement for a worn pack, or an upgrade to keep a second tool running while another charges. It’s aimed at users familiar with the GreenWks 40V system who want an affordable, quality replacement pack with basic safety features and an easy-to-read LED status indicator.