Einhell Sealed Battery | 18 V 4 Ah Water & Dust Proof Battery

This Einhell Sealed Battery belongs to the Power X‑Change family and gives you universal compatibility across all 18 V cordless pumps and garden tools. Moreover, the fully sealed IP57 housing protects the internal electronics from dust, dirt and pressurised water jets.

As a result, the battery performs reliably outdoors, even when pumps and tools face harsh conditions.

Additionally, the battery uses an innovative short‑circuit detection system. If water fully submerges the battery, internal sensors immediately shut down the electronics to prevent damage. Once the battery dries, you can use it again safely.

Consequently, this feature benefits Flux battery pump users and homeowners working with rain barrel pumps and submersible pumps.

Einhell water & dust proof battery – compact, powerful and built to last

Furthermore, with PLUS technology, the Einhell battery 18 V delivers enhanced performance in a streamlined, light weight package. It’s advanced lithium-ion cells deliver double the power for demanding applications, while the battery itself is 13% more compact and 12% lighter than previous models.

Consequently, this ensures consistently strong output with no memory effect and minimal self-discharge, keeping the battery ready for use even after extended storage.

Additionally, the integrated ABS battery management system continuously monitors temperature, voltage and load to maximise runtime, safety and extend service life. A 3‑stage LED indicator shows the remaining charge at a glance, while the rubberised housing provides excellent grip and impact protection.

Furthermore, the recessed handle makes removal from tools quick and effortless.

Two of these Einhell battery 4 Ah 18 V batteries can be used together for 36 V tools that require extra power. The 18 V 4 Ah sealed slimline Plus battery is supplied without acharger, however, a range of chargers is available to purchase separately.

Benefits of the 18 V 4 Ah Sealed Slimline Plus Battery

• Compact PLUS power in a smaller design — Firstly, this Einhell battery 18 V uses advanced 21700 cells to deliver the same performance as larger packs, while staying 13% more compact and 12% lighter. Ideal for anyone who wants a powerful yet easy‑to‑handle Einhell battery 4 Ah.
• Twin‑Pack ready for 36 V tools — Secondly, need more power? Simply pair two 18 V batteries to run high‑demand tools and Flux battery motors. One battery system covers both voltage levels, providing maximum flexibility.
• Fully sealed, Einhell water & dust proof battery protection — The IP 57 rated housing means this battery pack can withstand rain, dirt and even full immersion for up to 30 minutes. Perfect for rain barrel pumps and outdoor tools exposed to the elements.
• Smart short‑circuit detection for safety — Lastly, innovative sensors shut the battery down instantly if water is detected, preventing damage. Once dry, the Einhell Sealed Battery is ready to use again, giving you confidence in any environment.

Can this battery be used after being submerged in water?

Yes! Thanks to its fully-sealed IP 57 housing and short‑circuit detection, the battery consequently shuts down automatically if submerged. Once fully dry, it can be used again safely. Suitable for immersion and cleaning with a soft brush. Watch the product video here.

Is this battery compatible with all Einhell 18 V tools?

Yes. This Einhell battery 18 V works with every Power X‑Change product, including submersible pumps, garden equipment and workshop tools. It is also perfect for use with the Flux FBM 4100 battery motor for drum and IBC pumps (2 pcs required).

What makes this battery different from a standard 4 Ah battery?

It uses PLUS technology for the same performance in a slimmer, lighter design. Not only that, its IP 57 water and dust protection means it can be fully immersed in water without damage. Furthermore, it includes advanced ABS battery monitoring for improved performance and lifespan.

• Explore our full range of Einhell batteries and chargers for more options.
• Or contact Flux Pumps UK for expert advice on choosing the right battery for your tools.