New 40V 5000mAh Battery Replacement for Greenworks 40V Tools - Longer

Our review of the New 40V 5000mAh Battery Replacement finds it best suited for homeowners and pros who already own Greenworks G-MAX 40V tools and need noticeably longer run time without buying multiple batteries. The bottom line: this battery delivers substantially more runtime than 2.5 Ah or 2.0 Ah packs, while offering temperature and voltage monitoring for safer use outdoors. It is a practical swap for users who want an interchangeable pack that powers blowers, trimmers, hedge trimmers and lawn mowers without surprising compatibility issues when used with the specified G-MAX charger.

Key Features

• Compatibility with G-MAX 40V: Works specifically with G-MAX 40V tools and charger model 29482 so users can swap one battery among multiple tools without adapters.
• Extended runtime: Offers about two times the run time of a 2.5 Ah pack and roughly 2.5 times that of a 2.0 Ah pack, letting users finish larger yards on a single charge.
• All-weather performance: Designed to deliver fade-free power in demanding jobsite conditions so tools stay consistent through heat or cold.
• Protection electronics: Monitors voltage and temperature to protect against overloading and to help extend useful battery life under repeated use.
• Interchangeable system: Lets one battery operate blower, backpack blower, trimmer, hedge trimmer and mower, simplifying storage and charging for multiple tools.
• After-sales support: Backed by a service team for questions and support, which helps with setup or troubleshooting after purchase.

Who It's For

This battery is ideal for gardeners, property owners and landscape contractors already invested in the Greenworks G-MAX 40V ecosystem who want longer single-charge runtimes. If you use blowers, trimmers or a 40V lawn mower and prefer carrying just one higher-capacity pack between tools, this unit is a convenient, cost-effective replacement.

People who should look elsewhere include anyone using non-G-MAX 40V chargers or tools not listed with model 29482 compatibility, since the pack is specified for that system only. Also, buyers seeking the absolute lightest, smallest pack for very compact tools may prefer a lower-capacity battery.

Pros & Cons

Pros

• Longer run time compared with 2.5 Ah and 2.0 Ah 40V batteries, reducing recharge frequency.
• Works across the Greenworks 40V tool range, so one battery can serve many tools.
• Built-in voltage and temperature monitoring improves safety and longevity under heavy use.
• Reports from users indicate strong fit and reliable power comparable to original OEM packs.

Cons

• Compatibility is limited to the G-MAX 40V system and charger model 29482, so it will not work with other 40V variants.
• Customer feedback on battery life is mixed, with some users seeing shorter-than-expected long term capacity.

Specifications

Brand	BULL-TECH
Voltage	40V
Capacity	5000mAh (5.0Ah)
Compatibility	G-MAX 40V tools and charger model 29482
Runtime vs 2.5 Ah	About 2 times longer
Runtime vs 2.0 Ah	About 2.5 times longer
Protection	Voltage and temperature monitoring

Our Verdict

The New 40V 5000mAh replacement is a sensible buy for anyone invested in the Greenworks G-MAX 40V lineup who needs extended runtime and dependable all-weather performance. It offers strong value by replacing multiple smaller batteries and reducing downtime, though buyers must ensure they use the specified G-MAX charger and accept that a minority of users report variable long-term capacity.

Frequently Asked Questions

Will this battery work with all Greenworks 40V tools?
Yes, it is designed for Greenworks G-MAX 40V tools but is specified for use with charger model 29482.

How much longer does it run compared with lower-capacity packs?
Expect about two times the run time versus a 2.5 Ah battery and about 2.5 times versus a 2.0 Ah battery under similar loads.

Is there support after purchase if something goes wrong?
Yes, the product includes after-sales support from a professional service team for questions and troubleshooting.