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Model#: GWKN29662

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Brand new items;Full manufacturer warranty available
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Greenworks 29662 40V 4 Ah Lithium-Ion Battery

  • Greenworks 29662 40V 4 Ah Lithium-Ion Battery
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  • Due to federal regulations, this product can only be shipped within the continental US. Express delivery not available.


The all electric operation of the Greenworks' line of tools provides not only reliable performance and dependability, but also offer a clean running alternative to gas powered tools as well. Each Greenworks' tool comes with a variety of performance and safety features that not only help you get the job done right, they also promise carbon emission free operation for a cleaner environment.
Greenworks' Lithium-Ion batteries provide consistent and reliable power to your cordless Greenworks tools, delivering longer run times, more charges and clean operation.
  • Provides longer run times over the standard Greenworks 40V 2 Ah Lithium-Ion battery
  • No memory effect and runs througout entire cycle
  • Consistent power without fading
  • Longer life cycle up to 2000 charges
  • Battery charge level indicator
  • Note: 40V G-MAX and 40V Lithium-Ion Batteries are not cross compatible
  • 40V 4 Ah Lithium-Ion Battery - 29662
  • Owner's Manual


Battery Amp Hours: 4.0 Ah
Battery Style: Slide
Battery Type: Li-Ion
Compatible Models: All Greenworks 40V Cordless Tools
Recharge Time: 3 hrs.
Voltage: 40V



2.8 / 5.0
4 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
No, I would not recommend this to a friend (2)
Yes, I would recommend this to a friend (1)
Powerful (1)
Yes, I would recommend this to a friend
40V 4 Ah Lithium Ion Battery by Greenworks for 19" Mower
Green works will discontinue this battery, eventually, although a battery manufacturer may provide it for those people still operating the respective model of cordless mower. The mower and batteries were a great buy and are reliable. Although this battery has a 2 hour charge time it is still shorter than the original design that took 3 hours. The price was very reasonable and no trouble with the battery operation.
May 10, 2015
Not usable on larger projects
I have a company named P D Handy, I bought the twin motor mower and the trimer/ edger to do lawn project people requested. The thought was not to have to carry a gas can......seldom can I complete a yard in one day as the batteries do not last....had I know about the 80 system for the same price I would have never bought the 40...and 200 dollars for a battery is not something I care to I am stuck....spend 1000 dollars on batteries or buy a system that works for me.
May 11, 2017
Originally posted at
No, I would not recommend this to a friend
Greenworks 29662 battery
Bought to supplement 2 existing older batteries that were beginning to have a shorter life. However, this new one has a shorter life the others that are 2.5 years old.
May 8, 2015
No, I would not recommend this to a friend
The battery can only hold half an hour!
I use this for my 40V Cordless 19 in. 3-in-1 Lawn Mower, at the beginning I can work on my lawn for around 1 hour. After three month (used 4 or 5 times each month), the battery can only hold half an hour now.
October 16, 2014

Questions & Answers

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Browse 7 questions Browse 7 questions and 8 answers
I purchased a greenworks mower with charger and 2 40 v lithium batteries. Love it but now the batteries will not take a full is less then1 year old. Not sure if it is the charger or batteries. Red and green lights stay on. They have been stored inside for 3 months. With a full charge before storage.
PC on Mar 9, 2015
BEST ANSWER: I have worked with battery technology for the past several years, and one thing to remember is that lithium batteries should never be stored with a full charge. At the most, half a charge is acceptable. also, never charge a lithium battery when hot (allow them to cool down first). The batteries should be fully charged just prior to use. Storing them with a full charge will drastically reduce the life of the battery and its ability to maintain a charge.
my battery 29282 will not fit in the new greenworks trimmer 21332 I ordered. My battery was supposed to be interchangeable with all tools.
Joe on Jun 11, 2016
BEST ANSWER: The model 21332 uses the Greenworks 40v G-MAX batteries exclusively.
will the GreenWorks 29662 40V 4.0 AH battery, Gen 1. work with the GWNK24102 TWO SPEED HANDHELD BLOWER
SPIDEYOU2 on Jul 14, 2015
BEST ANSWER: Yes,the battery and blower are compatible.
I need a replacement battery for my green works 40v, 19 inch mower, model 25292 will this battery be compatible with it? the original battery model is 29282.
Manny on Jun 11, 2015
BEST ANSWER: Yes,the 29662 is compatible with the 25292 mower.
I have a Greenworks weed trimmer model#21132 with a 40V battery Model#29282. Is this trimmer compatible with your battery?
Bob on Apr 20, 2015
BEST ANSWER: The Greenworks 21132 40V Cordless Lithium-Ion 12 in. Straight Shaft Electric String Trimmer / Edger is compatible with the 29662 battery.
Will This Battery Work with My Greenworks 40v 20" Li-lon Extended Hedge Trimmer (BT)d
Tommie on Jan 29, 2015
BEST ANSWER: As long as your trimmer is not part of the G-max series, then yes
Will This Battery Work with My Greenworks 40v 20" Li-lon Extended Hedge Trimmer (BT)d
Tommie on Jan 29, 2015
BEST ANSWER: As long as your timmer is part of the Greenworks 40v system and not the 40c G-Max series, then yes it will work


Greenworks Warranty

Double The Industry Standard

NEW GreenWorks products are protected against all defects under normal use for a period of (4) four years (90 days for commercial use) from the shipping date.

Reconditioned GreenWorks products are protected against all defects under normal use for a period of 30 Days from the shipping date.

GreenWorks can opt to repair, replace or issue a refund for products that are determined to be defective, or that have been damaged during shipping. Replacement of products or parts subject to normal wear and tear is the responsibility of the customer. If GreenWorks accepts a return under Warranty, you can return the defective or damaged product only after you call and receive a Return Authorization from GreenWorks. You also will receive a refund for your original shipping charges, and GreenWorks will arrange and pay for your return shipping charges. Batteries carry a one-year warranty against defects in workmanship and materials. Batteries must be charged in accordance with the operator's manuals directions and regulations in order to be valid.