Make sure the battery is compatible with your tool brand and battery system. Check the voltage (V), capacity (Ah), and whether it’s an original or third-party model. Most modern batteries are Li-ion.
Batteries
Greenworks G40B4
The Greenworks G40B4 is a robust 40V battery with 4.0 Ah capacity, providing longer runtime than smaller models. Compact and compatible with the Greenworks 40V range, ideal for medium-sized garden tasks.
7.5
Capacity
6/10
Quality
8/10
Compatibility
9/10
Value for money
7/10
Total rating: 7.5/10
| Brand | Greenworks |
| Battery system | Greenworks 40V |
| Product title | G40B4 |
| Voltage | 40V |
| Capacity | 4.0 Ah |
| Battery type | Li-ion |
| Weight | 1,34 kg |
| Compatible chargers | 3 |
| Product page | Link |
Compatible chargers
Similar batteries
Compatible chargers
1. Greenworks G40C
40V, 2.0 A
700 – 800 SEK
The Greenworks G40C is a 40V charger with a 2.0A charging current. It is designed for Greenworks second-generation 40V batteries and provides safe and stable charging for garden and power tools.
6.8/10
2. Greenworks G40UC4
40V, 4.0 A
1,600 – 1,700 SEK
The Greenworks G40UC4 is a universal 40V fast charger with a 4.0A charging current. It provides fast and safe charging and fits multiple battery sizes, making it a flexible choice for users with varying needs.
7.5/10
3. Greenworks G40UC5
40V, 5.0 A
800 – 950 SEK
The Greenworks G40UC5 is a 40V fast charger with a 5.0A charging current. It provides quick and safe charging and fits multiple battery sizes, making it a versatile choice for garden and power tools.
7.8/10
Similar batteries
1. Greenworks G40B2
40V, 2.0 Ah
1,500 – 1,600 SEK
The Greenworks G40B2 is a lightweight and compact 40V battery with 2.0 Ah capacity, compatible with the Greenworks 40V system. A great choice for simpler garden tasks where convenience and good runtime matter.
6.8/10
2. Greenworks G40B5
40V, 5.0 Ah
2,400 – 2,600 SEK
The Greenworks G40B5 is a powerful 40V battery with 5.0 Ah capacity, offering even longer runtime. Robust, reliable, and compatible with the Greenworks 40V system, perfect for demanding garden projects.
7.8/10
FAQ
A quality battery typically lasts 3–5 years with normal use, or up to 1,000 charge cycles. Lifespan depends on how often it’s charged, how it’s stored, and the temperatures it’s exposed to. Well-maintained batteries last longer and perform better over time.
Higher voltage (e.g., 18V or 40V) provides more power, while higher capacity (Ah) extends runtime. Heavy-duty tools require both higher voltage and capacity for best performance.
Charge batteries regularly and avoid full discharges. Store in a cool, dry place and clean the contacts as needed. Always use compatible chargers.
Yes, especially if you work for extended periods or use demanding tools. Extra batteries give you flexibility and reduce downtime. Higher-capacity batteries can also be more cost-effective over time.
