Einhell Twinpack 4 Ah Plus Batteries – 18 V Power X Change

This twinpack is part of the Power X‑Change system, delivering universal compatibility across all Einhell 18 V cordless tools. Furthermore, these batteries are recommended for the Flux FBM 4100 battery motor.

Proprietary PLUS technology utilises advanced 21700 lithium‑ion cells, providing the same power as standard 4 Ah batteries in a slimmer, lighter package; thereby making your tools and pumps easier to handle without compromising on performance. In addition, these batteries are 13% more compact and 12% lighter than before. Furthermore, the high-quality cells resist memory effect and self-discharge, guaranteeing steady, reliable output for every task.

The digital ABS battery management system continuously monitors cell temperature, voltage and load; ensuring maximum safety and optimal performance. In addition, a 3‑stage LED indicator shows the remaining charge at a glance, helping you plan your work efficiently.

Einhell batteries 18 V – durable, safe and built for long service life

Each battery features a robust, rubber‑coated housing that protects against dust, corrosion and mechanical impact – ideal for outdoor and workshop environments. Additionally, the recessed grip makes removal quick and effortless, even when wearing gloves.

These Einhell batteries 18 V are ideal for 36 V tools that require extra power, such as lawn mowers, chain saws and the Flux FBM 4100 battery motor. This product includes 2 x PXC 4 Ah batteries; however, note the charger is sold separately.

• Compact PLUS power – Firstly, advanced 21700 cells deliver strong performance in a lighter, more efficient design.
• Consistent, reliable output – Secondly, high‑quality Li‑ion cells resist memory effect and maintain power even during demanding tasks.
• Smart ABS battery management – Microprocessor control ensures maximum safety, optimal runtime and long service life.
• Durable, impact‑resistant housing – Furthermore, the dust‑ and corrosion‑resistant casing with rubber protection is ideal for everyday use.

How long do the 4 Ah Plus batteries typically last when used with the Flux FBM 4100 cordless pump motor?

Runtime varies depending on application, however, you can typically expect to pump approximately 4,000 litres per charge.

Factors such as liquid temperature, viscosity & density, discharge pipe length & bore size and addition of valves or hand nozzles in the discharge line, will all impact run time.

However, most users find they can complete routine pumping tasks on a single charge.

Are the twinpack batteries a good option as replacement batteries for older Einhell tools?

Yes. The lightweight PLUS design makes them an excellent Einhell 18 V replacement battery for older or heavier tools, providing improved handling and longer runtime compared to earlier battery generations. Furthermore, your existing tools will benefit from new ABS battery management technology.

Do the batteries need to be fully discharged before recharging?

No. Thanks to modern lithium‑ion technology, these batteries can be topped up at any time without reducing their lifespan. Furthermore, there’s no memory effect, so you can recharge whenever it suits your workflow. Additionally, frequent charging does not harm the batteries.

• Explore our full range of Einhell batteries and chargers for more options.
• Consider extra-life 5-8 Ah Multi batteries for tough pumping tasks requiring extended run times
• Find more information about the Flux FBM 4100 cordless pump motor here.