This battery looks identical to my Swift 40v battery. Do you know if they are compatible?

I'm afraid it is NOT compatible. Each OEM tends to make a form-factor unique to it's range of tools (no surprise there!!)

Does this fit the Qualcast lawnmower?

Only green. Works appliances of the same voltage and ah

How long to charge at first?

Hi Gary, not too long. About 1 - 2 hours. When you're mowing/strimming etc., and you exhaust the battery, it will be quite warm and won't charge until it has cooled down (generally after about 30 mins). Hope this helps

When battery is fitted to charger both lights immediately go out, with no battery in place charger power light stays on what needs replacing ?

Under normal conditions, a flashing LED indicates that the battery is faulty - remove for 1 minute, unplug the charger and retry. If LED still flashes, replace the battery. If both lights go out, the battery is less than 10% charged - leave it in the charger and check the progress by pressing the BCI button. If the BCI remains unlit, then replace the battery.

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Greenworks 40V Battery & Universal Charger Kit - 2Ah Lithium-Ion Battery + 2A Charger. Compatible with All 40V Tools

Product ID: 394479869

Details

Battery capacity
2500
Battery cell composition
Lithium Ion
Brand
Greenworks
Number of batteries
1 Lithium Ion
Recommended uses for product
Lawn Mower

⚡90W/2A Fast Charging Output

💡LED Battery Charge Indicator

🔋40V 2Ah Lithium-Ion Power

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Description

🔋 Power your garden hustle with Greenworks—charge fast, work smart, stay unstoppable!

SMART LED INDICATORS - Multi-level LED display on battery and charger keeps you instantly informed about charge status—no more guessing games.
POWER MEETS ENDURANCE - 40V 2Ah lithium-ion battery delivers consistent power for all your Greenworks tools, keeping your workflow uninterrupted.
UNIVERSAL COMPATIBILITY - One battery to rule them all—works seamlessly across the entire Greenworks 40V tool lineup, from lawn mowers to chainsaws.
CHARGE ANYTIME ANYWHERE - No memory effect means you can top up the battery whenever you want without losing capacity—flexibility that fits your busy schedule.
DURABILITY SAFETY FIRST - Robust housing and advanced battery management system protect against damage and overheating, ensuring long-lasting performance.

The Greenworks 40V 2Ah Lithium-Ion Battery & Universal Charger Kit offers a powerful, versatile energy solution compatible with all Greenworks 40V tools. Featuring a 90W/2A fast charger and smart LED indicators, it ensures efficient charging without memory effect. Designed with durability and safety in mind, this kit supports extended run times and seamless tool interchangeability, making it the ultimate choice for professional-grade cordless gardening and workshop equipment.

Specifications

ASIN	B08VFT99H1
Amperage	2 Amps
Antenna Location	Lawn Mower
Battery Capacity	2500
Battery Cell Type	Lithium Ion
Battery Weight	0.83 Kilograms
Best Sellers Rank	10,455 in DIY & Tools ( See Top 100 in DIY & Tools ) 45 in Cordless Tool Battery Packs
Box Contents	1 40V 2Ah battery, 1 charger
Brand Name	Greenworks
Country of Origin	China
Customer Reviews	4.2 4.2 out of 5 stars (237)
Item Dimensions	11.9 x 7.4 x 23.5 centimetres
Item Type Name	Battery and Charger
Item Weight	1.61 Kilograms
Manufacturer	Greenworks
Model Name	GSK40B2
Model Number	01-000002936607
Number of Batteries	1 Lithium Ion batteries required. (included)
Product Warranty	Three years product warranty, two years battery warranty.
Reusability	Rechargeable
Unit Count	1.0 count
Voltage	40 Volts

Reviews

M**N

Excelient brand and excellent charge time

Always a good make of battery and tools. Lasts a while. Easy to use for a range of tools

14.05.2025

A**R

Perfection! Made moving heavy object really easy

For gardening, moving logs, taking hay and straw to our Donkeys. Makes hard jobs really easy. Joy to use

26.05.2022

R**O

Battery lasted 5 minutes before it died

1st 40v greenworks item and I'm very disappointed. Older 24v greenworks products were great but these new 40v ones are not. I bought the 40v blower and this battery only lasted 5 minutes and when I put it on charge it wouldn't charge because it was too hot...battery barely felt warm to the touch. Very disappointed

2.11.2025

G**Y

Great product lousy delivery just left on doorstep wide open !!!!

21.03.2023

J**D

Charger

Charges really quick

8.08.2023

P**S

Battery life is pitiful.

When used with the vac/blower, the battery lasts only few minutes.

25.06.2022

D**K

Excellente

2.02.2026

C**A

Ho sia motosega che tagliasiepi greenworks comprati nel 2024, dopo aver dovuto ricomprare entrambi visto l’uso intensivo che ne ho fatto in diversi anni di utilizzo, ora ho acquistato questa seconda batteria e carica batteria per averne una di riserva, ma utilizzo ancora l’altra da quasi 8 anni!!

28.01.2025

F**H

Absolut top. Beständig seit Jahren ohne Kapazitätsverlust.

26.07.2025

B**B

Impeccable !!! Ça met un peu de temps pour recharger mais ça va…

4.11.2024

L**J

Funkar perfekt😍

20.01.2024

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$353.32

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

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