---
product_id: 65786709
title: "Greenworks 40V 12-Inch Cordless String Trimmer, Battery and Charger Not Included, BST4000"
brand: "greenworks"
price: "R$1350"
currency: BRL
in_stock: true
reviews_count: 5
url: https://www.desertcart.com.br/products/65786709-greenworks-40v-12-inch-cordless-string-trimmer-battery-and-charger
store_origin: BR
region: Brazil
---

# 40V power Variable speed 12-inch cut Greenworks 40V 12-Inch Cordless String Trimmer, Battery and Charger Not Included, BST4000

**Brand:** greenworks
**Price:** R$1350
**Availability:** ✅ In Stock

## Summary

> 🌱 Trim Your Way to a Greener Tomorrow!

## Quick Answers

- **What is this?** Greenworks 40V 12-Inch Cordless String Trimmer, Battery and Charger Not Included, BST4000 by greenworks
- **How much does it cost?** R$1350 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/65786709-greenworks-40v-12-inch-cordless-string-trimmer-battery-and-charger)

## Best For

- greenworks enthusiasts

## Why This Product

- Trusted greenworks brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Battery Freedom:** Enjoy the convenience of cordless operation—battery and charger sold separately.
- • **On-Demand Control:** Adjust your trimming speed with the variable speed trigger for ultimate power management.
- • **Unleash the Power:** Experience fade-free performance with the G-MAX 40V Lithium-Ion Battery.
- • **Precision Trimming:** Effortlessly tackle weeds with a 12-inch cutting path and auto-feed head.
- • **Seamless Compatibility:** Easily swap out spools with the GreenWorks Replacement Spool, Model 2900719.

## Overview

The Greenworks 40V 12-Inch Cordless String Trimmer is designed for high performance with a powerful G-MAX 40V Lithium-Ion Battery that ensures fade-free power and no memory loss. It features a 12-inch cutting path with a dual line auto-feed head, a variable speed trigger for customizable power, and compatibility with GreenWorks replacement spools. Note that the battery and charger are not included, but it works seamlessly with various GreenWorks models.

## Description

Greenworks40V 12-Inch Cordless String Trimmer, Battery and Charger Not Included, BST4000

## Features

- High Performance G-MAX 40V Lithium-Ion Battery delivers fade-free power with no memory loss after charging
- 12-inch cut path with .065 dual line with auto-feed head to rip through weeds for fast trimming
- Variable speed trigger for power on demand
- Compatible GreenWorks Replacement Spool, Model 2900719
- Battery and Charger Not Included - Compatible with GreenWorks G-MAX 40V Lithium-Ion Battery Models 29472 and 29462 and Charger Model 29482

## Product Details

- **Brand:** Greenworks
- **Power Source:** Battery Powered
- **Color:** Green
- **Item Weight:** 8.4 Pounds
- **Cutting Width:** 30.5 Centimeters

## Images

![Greenworks 40V 12-Inch Cordless String Trimmer, Battery and Charger Not Included, BST4000 - Image 1](https://m.media-amazon.com/images/I/510DWM+52aL.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Impressive power to cut tall thick weeds
*by E***R on September 3, 2019*

This review is based on first use with 1 &1/2 charges..If I run into trouble and have to return it, I will update my experience. Battery life: about as expected and advertised. I trimmed f1/4 1 acre residential yard trimming heavy grass, including weeds with stalks up to 3/8" diameter& chain link fences in 1 1/2 charges. it has to run full throttle to cut the thick stuff, whereas my gas trimmer didn't. but then my gas trimmer blew up after maybe 25 uses and cost $200 and I got this one for $109 and can replace it without batteries for under $6o and it does the same job in the same time and is actually easier to use since it is lighter. Charges fast. Says 1 hour for this size battery, but maybe faster..\Weight: unlike gas models this unit is heavy at the cutting end. The battery is extremely light weight even not comparative to it's size, but I'd still rather own two 2 AH batteries than one 4AH. The string seems to be nothing generic like you can buy in bulk and I think more durable. Operation: it is not overpowered like the gas ones, therefore I don't recommend the 20V single string model to anyone who is trimming anything in addition to regularly mowed grass such as thick stalk weeds like I needed to cut. And obviously even this 40V model is not suitable for commercial, every day use..Regarding string feeding complaints in reviews: despite all the complaints and bad reviews here about this auto-feed design not feeding out, I had no problem with mine. I think the bad reviews based upon the supposed non feeding issue are due to the reviewers not reading the instructions. If they called support, i suspect the issue was resolved and they've all been too lazy or perhaps personally dishonest to change their reviews to reflect their mistakes. But if I am wrong and mine has an issue, I know I can depend upon Amazon and GteenWorks to resolve the issue for me. Feeding discussion continued: twice the string got short and i had to do what the instructions say, which is to pull the trigger for 2-5 seconds and then let off the trigger for 2-5 seconds before resuming work. one time when one string went up inside the spool, I had to take the spool out and refeed the line through the hole. Twice more I had to press the button in the side of the spool hub and manually pull out the strings on both sides. But most of the time it fed out automatically just as it says it does. And frankly, it works at least as well as my old bump feed one and if it stops auto feeding entirely, I would put up with having to stop once in a while and manually extracting the lines as described above, it works that good and costs so little comparative to rival products..I also almost sent it back the same day, today. because I placed it on charge after I finished the yard and in about 5 minutes the green "done" light came on and would not go off even if I unplugged everything and plugged it back on, it went right to "done charging". intent on sending it back I disassembled it and threw it in the box and went online and requested a return. Amazon automatically created a new order to replace it at 0$ an said I had a month to return this one. So then I looked at the battery again, which I had left in the charger plugged in, and it was charging and the read "charging light was on. It finally took a full charge.supposedly if a hot pack is plugged into the charger, it says teh hot pack indicator light is supposed to be orange. Well I am assuming that that was the problem, a hot pack, but the orange light never came on, just the red and green ones. So I am assuming that there is a minor malfunction in the charger either once or permanent that didn't let it show the "hot pack" delay it was in before I packed it up.I greatfully unpacked and reassembled it because I don't like being suckered by garbage products for any amount of $. I'd rather be wrong and have to repack and unpack something than actually have to return it because it's phony garbage. The only pleasure I get out of that experience is when i'm smearing the truth all over Amazon about my bad experience with the product with almost vengeful zeal.

### ⭐⭐⭐⭐⭐ Greenworks 40V 12" Cordless String Trimmer (two thumbs up)
*by C***M on May 19, 2025*

Greetings. Last year I purchased a Ryobi 40v weed eater that costs north of $200. Despite being a Ryobi fan I was never satisfied with that machine. I was very disappointed and felt like I wasted my money. Last week I went online and researched the best, budget level, weed eaters for smaller yards to service. This particular model showed up on several lists. I was somewhat taken aback because of the price tag of a little over $100 which includes the charger and battery. Honestly, I was worried that this was a cheap product. I am happy to report that I am extremely satisfied with this Greenworks 40V 12" Cordless String Trimmer.I actually think this trimmer is more powerful than the Ryobi model which cost me twice as much. The automatic line feed works great. This is also bit more lightweight than my previous weed eater. The unit is very easy to assemble in just a couple of minutes. I also love the fact that you can edge with this model. It has a small metal bar that you can flip forward and then rotate how you hold the trimmer and you now have a very capable edger. It's not a quiet trimmer but the noise level is normal in my opinion. Lastly, it seems sufficiently sturdy and built to last for quite a while. Amazon also sells the replacement spools of line. I also purchased a six pack of replacement line spools that should carry me through the summer.If you have a small yard or area to maintain and are on a budget then I think you will be pleasantly surprised with this model trimmer.

### ⭐⭐⭐⭐ Excellent deal at $100 w/ battery and charger
*by E***. on June 20, 2025*

Very good, easy-to-use and adjust. There is a bit of assembly at first...the handle on top and wire guards, but it's not too complicated. Also, the replacement spools are around $6/spool when you buy 3 spools. I had to replace the original spool after around 3-4 uses. The original spool was a metal wire while the replacements are plastic. The replacements last longer.It's a good value for money and I needed another battery for my lawnmower, so win-win. The battery life is perfect for the trimmer. Noise level is what you would expect. It's not too heavy, I'm able to lift this onto and off of a shelf without issue. The trimmer line extends automatically when you pull the trigger and gets cut by a blade on the wire guard. So the more you "rev" this trimmer, the more line you'll eat up. That's fine.Overall, it's a great deal at around $100 on sale. You receive another battery and charger, too.

## Frequently Bought Together

- Greenworks 40V 12-Inch Cordless String Trimmer, Battery and Charger Not Included, BST4000
- Greenworks 0.065" Dual Line Auto-Feed String Trimmer Spools (6-Pack) + Replacement Spool Cover
- Greenworks 40V 16" Cordless (Push) Lawn Mower (75+ Compatible Tools), 4.0Ah Battery and Charger Included

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*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-01-23*