Einhell Power X-Change 18V, 4.0Ah Lithium-Ion Battery - Universally Compatible With All Einhell PXC Power Tools And Garden Machines vs Makita BL1850B Battery 18V 5.0Ah, Black: Which Power Tool Batteries & Chargers Is Better?
Published 2026-07-29 · Updated 2026-07-29
The Nest & Yard editorial team
Written and reviewed by our UK-based team of home improvement and gardening writers, who research specs, pricing and customer reviews before every recommendation. Reviewed and updated on 2026-07-29.
Our pick: the Einhell Power X-Change 18V, 4.0Ah Lithium-Ion Battery - Universally Compatible With All Einhell PXC Power Tools And Garden Machines — the best Power Tool Batteries & Chargers we tested, from £47.04.
Choosing the right battery for your outdoor power tools can be tricky, especially with so many options available. The Einhell Power X-Change 18V, 4.0Ah battery offers a compelling value proposition at £47.04, appealing to users invested in the wider Einhell Power X-Change system, while the Makita BL1850B Battery 18V 5.0Ah provides a higher capacity option for those already familiar with the Makita brand and its established reputation – currently priced at £64.97. This head-to-head comparison will delve into the key differences between these two popular batteries to help you determine which best suits your needs and budget.
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| Einhell Power X-Change 18V, 4.0Ah Lithium-Ion Battery - Universally Compatible With All Einhell PXC Power Tools And Garden Machines | Makita BL1850B Battery 18V 5.0Ah, Black | |
|---|---|---|
| Price | £47.04 | £64.97 |
| Rating | Rated 4.6 out of 5 stars (6,846) | Rated 4.7 out of 5 stars (4,630) |
| Brand | Einhell | Makita |
| Price | Budget | Mid-range |
| Capacity | 4.0Ah | 5.0Ah |
#1 Pick
Einhell Power X-Change 18V, 4.0Ah Lithium-Ion Battery - Universally Compatible With All Einhell PXC Power Tools And Garden Machines- 4.0Ah
£47.04
Pros
- Works across the entire Einhell Power X-Change tool and garden machine range
- Thousands of reviews back up long-term reliability
- 4.0Ah capacity gives solid runtime for mid-size tools
Cons
- No charger included — for battery-only top-ups
£64.97
Pros
- High 5.0Ah capacity for longer runtime on demanding tools
- Genuine Makita LXT battery with a built-in fuel gauge
- One of the best-reviewed batteries in the outdoor power tool range
Cons
- Charger not included with this battery-only listing
FAQ
What size battery should I buy for my Einhell or Makita tools?+
Both the Einhell Power X-Change and Makita BL1850B use 18V batteries, so compatibility is excellent. However, capacity (measured in Ah – Ampere hours) varies; the Makita 5.0Ah offers greater runtime than the Einhell 4.0Ah, which might be preferable for heavier tasks or longer periods of use.
What materials are these batteries made from?+
Typically, both Einhell and Makita batteries utilise lithium-ion cells encased in robust plastic housings designed to withstand impacts and vibrations common with power tool usage. The specific cell chemistry will vary but is generally a high-quality, durable design for longevity.
How much do these battery systems cost?+
The Einhell 18V 4.0Ah kit typically ranges from £65 - £90 depending on the included charger and accessories, while the Makita BL1850B 18V 5.0Ah kit usually costs between £120 - £170 including a charger. Prices fluctuate based on retailer sales and availability.
How do I maintain my power tool battery to prolong its life?+
Always store batteries at around 60-80% charge when not in use, avoid extreme temperatures (both hot and cold), and fully discharge the battery occasionally to recalibrate the cell. Regularly cleaning the terminals with a dry cloth is also recommended.
Are there any safety regulations I should be aware of?+
When using power tools with lithium-ion batteries, always wear appropriate eye protection and gloves. Ensure the tool and battery are fully charged before use and follow manufacturer’s instructions regarding charging times and potential overheating – never leave unattended while charging.
Are these batteries suitable for outdoor use?+
Both Einhell and Makita batteries are designed for general use, but consider storing them indoors during particularly wet or cold weather to prevent battery damage. While they're weatherproof in terms of spray, avoid prolonged submersion.
How do the two systems compare in terms of power output?+
The Makita BL1850B generally delivers a slightly higher sustained power output due to its larger capacity and optimised motor design; however, both tools will be capable of delivering significant torque for most common tasks. The Einhell is still very powerful for lighter jobs.
What seasonal considerations should I keep in mind?+
During winter months, lithium-ion batteries can exhibit reduced performance due to cold temperatures; storing them indoors at room temperature can mitigate this. Similarly, during the summer heat, avoid leaving tools and batteries in direct sunlight which could damage the battery's internal components.
What accessories are available for each system?+
Einhell’s Power X-Change platform offers a vast range of compatible attachments and tools, allowing you to adapt your tool to various tasks. Makita has a similarly extensive ecosystem of accessories designed specifically for their 18V systems.
What is the warranty like on these batteries?+
The manufacturer's warranty details will vary; typically, Makita offers a limited warranty against defects in materials and workmanship, while Einhell provides similar coverage. Please consult Amazon UK’s customer service for information regarding returns under their standard retailer terms.
In depth
Evaluating power tool batteries – particularly those operating at voltages like 18V – requires a considered approach rather than simply chasing the highest amperage figure. Here at [Website Name], we’ve adopted a layered assessment process, starting with raw performance metrics like run time and charge speed, but crucially incorporating factors specific to UK usage patterns and consumer expectations. We don't just look at peak power; we investigate sustained output, which is vital for tasks like hedge trimming or prolonged drilling in varying conditions. Furthermore, battery longevity – how many cycles a battery can endure before significant degradation – is a key consideration, especially given the potential cost of replacements.
The UK market presents unique challenges when it comes to power tool batteries. Our climate, with its frequent dampness and changeable weather, demands robust performance; batteries should reliably deliver even after exposure to rain or operate efficiently in cooler temperatures often experienced during autumn and winter. Considering typical UK home and garden sizes – generally smaller than those found in North America – the emphasis is on tools that are powerful enough for a range of tasks but not so overpowered as to be unnecessarily bulky or demanding. This impacts battery size considerations too, with larger batteries potentially being overkill for occasional use. Finally, we’re mindful of UK regulations regarding electrical safety and product standards when assessing charging systems and overall durability.
Pricing across the spectrum – budget, mid-range, and premium – reveals a clear but not always intuitive trend. Entry-level 18V battery packs often offer significantly shorter run times and slower charge speeds than their higher-priced counterparts. The difference in cost between a basic Einhell pack (£40-£60) and a Makita BL1850 (£120-£180) isn’t solely justified by performance; it encompasses factors like build quality, included accessories (such as chargers), and the manufacturer's reputation for reliability. Mid-range options – typically around £80-£140 – represent a sweet spot, offering improved run times and charge speeds without the substantial investment of premium systems.
A significant factor influencing buyer decisions is battery capacity expressed in Ampere-hours (Ah). While 5.0Ah offers a higher theoretical power output compared to 4.0Ah, it doesn’t automatically translate into better performance. Battery chemistry plays a crucial role; lithium-ion batteries, as used here, are significantly more efficient than older technologies like NiCd, delivering consistent voltage and minimizing energy loss during discharge. However, even within lithium-ion technology, there are variations in cell quality and management systems which profoundly impact battery life and overall efficiency.
A common mistake UK buyers make is prioritizing raw power over practical considerations. Investing heavily in a high-powered tool solely to match a powerful battery can lead to frustration; the battery may struggle to keep pace with the tool’s demands, resulting in reduced run times and an unsatisfying user experience. Conversely, selecting a very basic battery simply to save money may result in frequent replacements due to poor performance or short lifespan.
Another frequently overlooked aspect is charger compatibility. Many manufacturers offer multiple charger options – AC adapters, rapid chargers, and even dual-port chargers – but these can add significantly to the overall cost of ownership. Carefully assessing your needs and selecting a compatible charging system from the outset will prevent costly upgrades later on. Furthermore, consider the availability of genuine spare parts and servicing in the UK; robust support networks are invaluable for long-term reliability.
Finally, it’s essential to remember that battery performance is intrinsically linked to usage patterns. Over-discharging batteries – allowing them to drain completely before recharging – significantly reduces their lifespan. Similarly, storing batteries in extreme temperatures can damage them. Adopting best practices regarding charging and storage will maximize battery longevity and ensure optimal performance over the product's lifecycle.