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GreenWorks G-MAX 40V 4.0Ah Li-Ion Battery
  • GreenWorks G-MAX 40V 4.0Ah Li-Ion Battery
  • Greenworks 40V 4.0Ah Li-Ion Battery
  • Greenworks 40V Range

Greenworks 40V 4.0Ah Li-Ion Battery

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4.7 (147 reviews)
$129
or 4 payments of $32.25 on
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The Greenworks G-MAX 40V lithium-ion battery system delivers longer run time, higher performance, and greater output among all Greenworks G-MAX tools.

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Product overview

The Greenworks G-MAX 40V lithium-ion battery system delivers longer run time, higher performance, and greater output among all Greenworks G-MAX tools.

About Greenworks The future is here and it's electric. Once you’ve experienced the power, convenience and economy of a 40V garden tool there will be no going back. The G-MAX 40V Li-Ion range from Greenworks is already a best-seller in the US and Europe, now it’s ready to revolutionise the way Kiwi’s take care of their backyard.

Greenworks tools are clean, green, quiet and maintenance free, with no compromises – experience the future today.

FEATURES
• 4.0Ah, 40V Lithium-Ion battery
• Compatible with all products within the Greenworks 40V range
• Fast charging
• No memory effect
• No self-discharge
• One Greenworks G-MAX 40V battery powers all Greenworks 40V tools
• 3 Year Greenworks Battery Warranty

SPECIFICATIONS
Product code: 2927007
Model: G40B4
Voltage: 40V
Charging time 100% (4Ah): 120mins
Battery pack capacity: 4Ah
Watt hours: 144Wh
Weight: 2kg

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Questions and answers

5 votes
Q:
How many discharge cycles is it rated for?
A:
Up to approx 2000.
By Trade Tested on January 20 2020
1 vote
Q:
How much time does the battery last for before it runs out while in use?
A:
This is not an easily answered question, this is rated at 4Ah (amp hours), which means it has enough charge to run for an hour when a steady current of 4A is being drawn. However in practice no tool really runs like this - it depends on power needed to run the tool and loading required by the job. So even on the same tool (say a chainsaw) the run time will change depending on the hardness of the wood etc.
By Trade Tested on January 05 2021
0 votes
Q:
Is the 4.0Ah compatible with the polesaw and hedge trimmer? Will it fit in their housings?
A:
Yes the 4.0Ah battery is compatible. As long as you are using a 40V Greenworks battery on a 40V Greenworks product then it will work!
By Trade Tested on November 27 2022
1 vote
Q:
Is it a direct replacement for the 2 AH unit and does the charger suit both 2 and 4 AH Batteries?
A:
Yes to both.
By Trade Tested on March 26 2020
0 votes
Q:
Will this battery operate the 18V LI-ION Hedge trimmer and the Blower Vac G-Max 40V LI-ON?
A:
This will only operate 40V.
By Trade Tested on December 29 2021
0 votes
Q:
will this power a GREENWORKS LAWNMOWER 40V 460MM SELF-PROPELLED 5.0AH ?
A:
Yes it will.
By Trade Tested on November 15 2021
0 votes
Q:
Hi will this be suitable to replace the Ryobi 36v battery and if so will the ryobi charger work with it?
A:
No it won't, these are not cross-compatible with other brands (and vice versa).
By Trade Tested on May 20 2020

Reviews (147)

4.7 out of 5 stars from 147 reviews

Customer photos

Overall rating

  • 5 star
    78%
  • 4 star
    20%
  • 3 star
    1%
  • 2 star
    1%
  • 1 star
    0%
All reviews (147)

Read reviews that mention

  • one battery
  • recharge
  • 4 amp
  • 2.0ah
  • one go
  • greenwork lawnmower
  • greenwork product
  • extra battery
  • spare battery
  • job without
Spare battery just in case

Always good to have a spare battery as there will always be other skins that you will want to buy.

SteveO Wellington
Yes, I recommend this product.
Does the job

Bought instead of 6.0Ah (which we've previously purchased for mother who has much bigger and thicker lawn) and it does our lawn fine, if not overgrown, so totally happy! Greenworks products are excellent and the team at Tradetested, awesome.

Sian S Auckland
Yes, I recommend this product.
FishBusters

Powerful Li-Ion Batts, but should have warning to charge in a box that would retain a runaway battery fire

Fishbusters Auckland
Yes, I recommend this product.
Greenworks 40V 4.0Ah Li-Ion Battery

Very pleased with the batteries

Muzz Otago
Yes, I recommend this product.
Additional battery

We have two Greenworks tools but only one battery. Bought this to extend our time when the grass shoots away.

Maurice M Ohope
Yes, I recommend this product.
Greenworks 40V Battery

I bought this battery so that I had a spare battery fully charged if the mower ran out of puff before I had finished the lawns...I also have a Greenworks line trimmer which uses the same battery - a great combination.

Tony Whanganui
Yes, I recommend this product.
40v 4amp hour green works battery

Good battery, always a good treat to have a few batteries

Edward S Canterbury
Yes, I recommend this product.
Great battery

Great replacement battery.

Gina G Auckland
Yes, I recommend this product.
Battery

Good to have a backup

Rudge Rucker Canterbury
Yes, I recommend this product.
Battery

Great long lasting. Love them for all my tools

Marg B Otago
Yes, I recommend this product.

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