Einhell 5–8 Ah Plus Battery – 18 V Multi Ah Power Battery

This Einhell 5–8 Ah Plus Battery utilises Multi‑Ah technology, you can also choose between:

• 5 Ah mode for up to 300% longer cell lifespan
• 8 Ah mode for maximum runtime and performance

Consequently, this makes it ideal for both routine tasks and high‑demand applications, such as running submersible pumps for long periods, or pumping large volumes with the Flux FBM 4100 battery motor.

Furthermore, the latest generation lithium‑ion cells deliver 100% more power, for strong, consistent output even under heavy load. PLUS technology also provides an extra performance boost for energy‑intensive jobs, giving you the confidence to tackle tougher tasks.

Einhell 18 V replacement battery – durable, intelligent and built to last

Additionally, the integrated, microprocessor controlled ABS battery management system continuously monitors temperature, voltage and load to maximise safety, runtime and lifespan. A digital display also shows the exact charge level as a percentage, helping you plan your work and charging sessions efficiently.

The housing is designed to resist dust, corrosion and mechanical impact, while the rubberised coating provides excellent grip and shock protection. The trough handle ensures quick, effortless removal from any Power X‑Change tool and the Flux FBM 4100 motor.

This Einhell 18 V replacement battery is Twin‑Pack compatible – combine two batteries for 36 V tools that require extra power.

• Two modes for total flexibility – Switch between 5 Ah long‑life mode or 8 Ah high‑performance mode depending on the task.
• PLUS technology for compact, powerful performance – Advanced 21700 cells deliver high efficiency in a light, compact design.
• Smart ABS battery management – Monitors all parameters for maximum safety, runtime and tool performance.
• Compatible with optional PXC battery protector – The optional silicone case protects against splashing liquids.
• Durable, impact‑resistant housing – Furthermore, the dust‑ and corrosion‑resistant casing with rubberised impact protection provides long‑term reliability.

How does Multi‑Ah mode work?

You can switch between 5 Ah mode for extended cell lifespan, or 8 Ah mode for maximum runtime, allowing you to safeguard the life of your battery, or provide extended runtime for tough tasks.

Is this battery compatible with the Flux FBM 4100 battery motor?

Yes. This Einhell accupack 18 battery works with the Flux FBM 4100 battery motor, along with every Einhell Power X‑Change tool, including garden equipment, workshop tools and submersible pumps.

Does the battery lose charge when stored?

No. The high‑quality lithium‑ion cells have extremely low self‑discharge, so the battery stays ready to use even after long periods of storage.

• Explore our full range of Einhell batteries and chargers for more options.
• Furthermore, you can contact Flux Pumps UK for expert advice on choosing the right battery for your pump.