Top Batteries for Homeowner String Trimmers in 2025
For most homeowners, the EGO Power+ 56V 5.0Ah battery stands out as the top choice. It pairs with EGO’s popular string trimmers, delivers up to 45 minutes of continuous trimming, and charges in 30 minutes. Its limitation is the higher upfront cost compared to some competitors, but the performance justifies it.
A reliable battery is the heart of a cordless string trimmer. Choosing the right one affects how long you can work and how much power you have. Homeowners need a battery that provides enough runtime for their yard without excessive weight.
This guide compares top battery options from leading brands. We considered real-world feedback from owners and specifications to help you decide. Whether you have a small lot or a larger property, there is a suitable choice.
How to pick the right one
The top picks, ranked
EGO Power+ 56V 5.0Ah Battery
The EGO 56V battery is a powerhouse for string trimmers. It delivers consistent power and long runtime, ideal for medium to large yards. Owners appreciate its fast charging and durability. It works with all EGO 56V tools, making it a versatile investment.
Pros
- Long runtime up to 45 minutes
- Fast charging in 30 minutes
- Compatible with multiple EGO tools
Cons
- Higher price than some competitors
- Heavier than lower capacity options
DeWALT 20V MAX 5.0Ah Battery (DCB205)
The DeWalt 20V MAX battery is a solid choice for homeowners who own DeWalt tools. It provides reliable power for string trimmers and other 20V devices. Owners report good runtime and durability. The battery fits many DeWalt tools, expanding its usefulness.
Pros
- Trusted brand reliability
- Works with a wide range of DeWalt tools
- Good runtime for small to medium yards
Cons
- Lower voltage may lack power for thick weeds
- Charging time is longer than some
Makita 18V LXT 5.0Ah Battery (BL1850B)
Makita’s 18V LXT battery is known for its compact design and lightweight feel. It offers enough power for trimming tasks without the bulk. Owners appreciate its compatibility with Makita’s extensive line of tools. The battery charges quickly and holds its charge well.
Pros
- Lightweight and compact
- Compatible with many Makita tools
- Reliable performance
Cons
- May require frequent swaps for larger yards
- Not the highest voltage available
Ryobi 18V ONE+ 4.0Ah Battery (P193)
Ryobi’s 18V ONE+ battery is an affordable option for homeowners with small to medium yards. It provides sufficient runtime for basic trimming. Owners like the value and the compatibility with Ryobi’s extensive tool lineup. It’s a practical choice for occasional use.
Pros
- Budget-friendly price
- Works with many Ryobi tools
- Good for small trimming jobs
Cons
- Lower capacity means shorter runtime
- Less power for heavy vegetation
Greenworks 40V 4.0Ah Battery (29472)
Greenworks 40V battery is designed for their line of outdoor tools, including string trimmers. It offers a balance of power and runtime. Owners appreciate the quick charging and the ability to use it across multiple Greenworks products. It is a reliable choice for general yard maintenance.
Pros
- Good power for residential trimming
- Fast charging
- Compatible with Greenworks 40V lineup
Cons
- Limited to Greenworks tools
- Heavier than some comparable batteries
Kobalt 40V 5.0Ah Battery (K40B50-05)
Kobalt’s 40V 5.0Ah battery provides extended runtime for string trimmers and other outdoor tools. It is a solid performer for medium yards. Owners note its durable build and consistent power output. The battery is designed to fit Kobalt’s 40V system seamlessly.
Pros
- Long runtime due to high capacity
- Sturdy construction
- Good for larger trimming areas
Cons
- Charging time could be faster
- Only works with Kobalt tools
Craftsman V20 4.0Ah Battery (CMCB204)
Craftsman V20 battery is a dependable option for homeowners using Craftsman string trimmers. It provides ample power for typical trimming tasks. Owners appreciate its affordability and compatibility with the V20 system. This battery is a practical choice for budget-conscious buyers.
Pros
- Affordable price point
- Good performance for the cost
- Compatible with Craftsman V20 tools
Cons
- Lower capacity may require extra battery for big yards
- Charging time is moderate
How they compare
| # | Model | Voltage | Best for | Score | Price |
|---|---|---|---|---|---|
| 1 | EGO Power+ 56V 5.0Ah Battery | 56V | Best overall for most homeowners | 9.4 | Check price |
| 2 | DeWALT 20V MAX 5.0Ah Battery (DCB205) | 20V | Best for those already in DeWalt ecosystem | 9.1 | Check price |
| 3 | Makita 18V LXT 5.0Ah Battery (BL1850B) | 18V | Best for compact and lightweight needs | 8.9 | Check price |
| 4 | Ryobi 18V ONE+ 4.0Ah Battery (P193) | 18V | Best budget-friendly for small yards | 8.7 | Check price |
| 5 | Greenworks 40V 4.0Ah Battery (29472) | 40V | Best for Greenworks users | 8.5 | Check price |
| 6 | Kobalt 40V 5.0Ah Battery (K40B50-05) | 40V | Best for Kobalt 40V tool owners | 8.3 | Check price |
| 7 | Craftsman V20 4.0Ah Battery (CMCB204) | 20V | Best value for Craftsman owners | 8.0 | Check price |
Frequently asked questions
Can I use any battery with my string trimmer?
No, you must use a battery that matches the voltage and brand of your trimmer. Using an incompatible battery can cause damage or safety issues.
How long does a trimmer battery last?
Runtime depends on battery capacity and trimming conditions. A 5.0Ah battery can last 30 to 45 minutes under normal use. Thick weeds and high grass drain the battery faster.
What does Ah stand for on a battery?
Ah stands for amp-hour, which indicates the battery’s energy storage capacity. A higher Ah rating means more runtime, but also more weight.
Is a higher voltage battery always better?
Higher voltage usually means more power, but it also means a heavier battery. For homeowner tasks, 40V to 56V is plenty. Consider your trimming needs and physical comfort.
Can I leave the battery on the charger?
Most modern chargers are smart and prevent overcharging. However, it’s best to remove the battery once fully charged to prolong its lifespan.
How should I store my trimmer battery?
Store the battery in a cool, dry place away from direct sunlight. Avoid extreme temperatures. Ideal storage is at room temperature with a partial charge (around 50%).
Why does my battery die quickly in cold weather?
Cold temperatures reduce battery performance. Lithium-ion batteries are less efficient when cold. Keep the battery warm before use and store it indoors when not in use.
Can I use a battery from another brand with an adapter?
Adapters exist, but they are not recommended. They can affect performance and safety. Using original brand batteries is safer and maintains warranty.
How many years will a trimmer battery last?
With proper care, a lithium-ion battery can last 3 to 5 years. Over time, capacity decreases. When runtime becomes too short, consider replacing the battery.
What is the best way to dispose of an old battery?
Do not throw batteries in the trash. Take them to a recycling center or a store that collects rechargeable batteries. Many hardware stores offer recycling programs.
Our take
After comparing these batteries, the EGO Power+ 56V 5.0Ah is the clear winner for most homeowners. It offers an optimal balance of runtime, power, and fast charging. For those already using a specific brand, stick with that brand’s battery to ensure compatibility. Budget-conscious buyers might choose the Ryobi 18V, but for the best trimming experience, invest in the EGO.
