Best Akku 4ah 2026

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Last Updated - 03.02.2026

Best Choice

01

Einhell

Original Einhell 4Ah Power X-Change Plus Battery (18 V, Li-Ion, Universal Use for All PXC Devices, Charge Level Control, Twin Pack, Includes 2 x 4 Ah Batteries, without Charger)

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28% Off
9.8

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Twin pack technology - With the innovative Twin-Pack technology, two Power X-Change batteries can be coupled together. This means that 36 V devices can also be operated.
Sturdy housing - The case resists dust, corrosion and mechanical influences. The rubber coating and the recessed grip offer high impact protection and optimal handling.
Safety and performance: The battery management system monitors the parameters of the battery using a microprocessor and ensures maximum safety and maximum runtime.
Power X-Change - The 18V 4.0Ah Power X-Change PLUS batteries are part of the Einhell Power X-Change family, where all batteries, chargers and system devices can be combined.
Plus technology - The Power X-Change batteries provide all battery devices in the garden and workshop with power and endurance. Plus technology stands for extra power.
No self-discharge - The high-quality batteries resist the memory effect and self-discharge. A 3-stage LED display always provides information about the current charging status.
More power - The latest generation lithium-ion cells create 100% more power even with a more compact design and weight reduction.

79,95 € 110,95 €(28% Off off)
02

Bosch

Bosch Professional 18 V System Battery ProCORE18 V 4.0 Ah (in Box)

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9.6

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

With optimised size and minimal weight, the new cell technology offers the same performance as a 4.0 Ah standard battery
Professional 18V system. Ultimate performance. Maximum flexibility. All batteries are compatible with updated and existing Bosch Professional tools of the same voltage class
Coolpack 2.0 technology ensures 135% longer life than standard batteries thanks to superior heat dissipation
Compatible since 2008: All of our batteries fit into the new and existing Bosch Professional tools within the respective voltage class
Box contents: ProCORE 4.0Ah 18V battery, box

59,00 €
03

Einhell

Original Einhell Starter Kit Battery and Charger Power X-Change Volks.Battery, Lithium Ion, 18 V, 4.0 Ah Battery and Quick Charger, Suitable for all Power X-Change Devices

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9.5

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

The rubberised housing of the battery provides a high level of shock protection and a firm grip. Built-in recessed grips make it easy to remove the battery. The charger is already prepared with built-in hanging loops for wall mounting. The maximum charging time with fast charging technology is 75 minutes.
The multifunctional Power X-Change battery system, which can be combined with one another, is suitable for cordless tools from the entire product family in the garden and workshop area. The battery system can be used universally for all devices in the Power X-Change series.
The high-quality lithium-ion cells resist battery-standard self-discharge and can be recharged during any phase without damage.
The Einhell 18 Volt 4.0 Ah PXC Starter Kit is the most powerful set in the product family, featuring a powerful 4.0 Ah battery and a PXC series charger.
Einhell's proactive battery and intelligent charging management ensures maximum safety in operation, as well as during the charging period. All battery parameters are monitored by the available components.
During charging, the cycle is continuously monitored to ensure the optimum mode. Battery life is significantly extended by the situationally adjusted charging cycles.
A three-level LED charge indicator on the battery shows the current energy reserves. The 6-stage charging system shows the current charge level in real time during the charging cycle.

32,89 €
Value for Money

04

Einhell

Einhell PXC Twin Pack 4.0 Ah Power X-Change Volks.Battery (Li-Ion, 18 V, 2 x 4.0 Ah, Suitable for all PXC Devices, Proactive Battery Management, Situational Adapted Charge Cycles

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9.2

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

The charging status can be read at a glance: The three-stage LED-system provides the constant possibility of charge control.
The Einhell PXC Twin-pack 4.0 Ah battery consists of two universally applicable 18 volt batteries from the Power X-Change range and offers double power for all devices in the innovative system series.
Maximum safety is provided by Einhell's proactive battery management and all parameters of the battery are always monitored by the most modern components.
Lithium-ion cells provide more power with immunity to ‘battery-common’ diseases and resist battery self-discharge. The battery life is significantly extended by situationally adapted charging cycles.
A high impact protection and a good grip is ensured by the rubberised housing. Thanks to the adapted recessed grips, the batteries can be easily inserted and removed.

54,99 €
05

Bosch

Bosch Home and Garden PBA Battery Pack, 18 V, 4.0 Ah, W-C, 18 V System, in Box, 1600A011T8

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9.1

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Power supply for all 18 V tools. The included battery is compatible with all products of the Bosch Home and Garden green 18 V system and Bosch Unlimited vacuum cleaners
Long battery life. Ideal for extensive projects such as hedge cutting and sanding
Flexible, maximum performance and long service life for tasks around the home or garden
Excellent operating time. Perform very large and challenging DIY projects with one charge
Compatible with AL1810 CV, AL 18V-20, AL1815 CV, AL 1830 CV, AL 1880 CV/not compatible with AL 2204 CV, AL 2215 CV
Compatibility: The battery can be used with almost all Bosch 18 V home and garden tools, except PSM 18 LI and ALB 18 LI

34,53 €
06

Einhell

Original Einhell System Power X-Change Battery (Lithium Ion Battery, 18 V, 4.0 Ah, Suitable for All Power X-Change Devices)

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19% Off
9.0

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Twin pack technology: Thanks to the innovative twin pack technology, the batteries can not only be replaced with each other, but also paired.
Soft charging to prevent deep discharge, thus ensuring a long service life
Rubberised housing provides high impact protection and a firm grip.
Original Einhell Power X-Change battery - see product description for further information.
One battery for all Power X-Change devices from Einhell.
Latest technology - a microprocessor provides constant control and monitoring of temperature, voltage etc.
High-quality Li-ion battery cells ensure almost no self-discharge.

37,03 € 45,95 €(19% Off off)
07

Einhell

Original Einhell System Power X-Change Battery (Lithium Ion Battery, 18 V, 4.0 Ah, Suitable for All Power X-Change Devices)

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26% Off
8.9

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Twin pack technology: Thanks to the innovative twin pack technology, the batteries can not only be replaced with each other, but also paired.
Soft charging to prevent deep discharge, thus ensuring a long service life
Rubberised housing provides high impact protection and a firm grip.
Original Einhell Power X-Change battery - see product description for further information.
One battery for all Power X-Change devices from Einhell.
Latest technology - a microprocessor provides constant control and monitoring of temperature, voltage etc.
High-quality Li-ion battery cells ensure almost no self-discharge.

33,99 € 45,95 €(26% Off off)
08

Einhell

Original Einhell 4 Ah PLUS Power X-Change Starter Kit (1x 18 V 4 Ah PLUS Akku, 1x 3 A Ladegerät, 75 min Ladezeit, passend für alle Power X-Change Geräte)

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8.7

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Starter Set - The Einhell 4Ah PLUS PXC Starter Kit is an optimal set for beginners to the Power X-Change range. The set includes a 4Ah battery and a fast charger.
Safety - The ABS battery management system monitors the parameters of the battery and ensures maximum safety, optimal performance and maximum runtime.
STURDY CASING - The battery case with practical recessed grip resists dust, corrosion and mechanical influences, while the rubber coating provides high impact protection.
Ready to go - With the quick charger, the 4 Ah battery is ready to use after just 75 minutes. If the battery stays in the charger longer, it is gently charged to 100%.
Power X-Change – The Power X-Change system series offers more power and more endurance in a limitless combination of batteries, chargers and devices.
No self-discharge - The battery resists the memory effect and the battery standard self-discharge. A 3-stage LED indicator always provides information about the charging status.
Intelligent charging management - Intelligent charging management and permanent battery monitoring ensure optimal, gentle charging and high safety.

43,12 €
09

Bosch

Bosch Akku und Schnellladegerät Starter Set 18V (1x 4,0Ah Li-Ionen-Akku; 1x Schnellladegerät; POWER FOR ALL 18V Alliance)

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8.6

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Powerful 4.0 Ah battery: no memory effect, no self-discharge - always ready to use thanks to lithium-ion technology
Power for all battery and charger suitable for all Bosch Home & Garden devices of the 18 volt system
Power for all alliance: 1 battery, 10+ brands, 150+ devices
Long battery life - Ideal for extensive projects such as hedge trimming, grinding and sawing to keep your DIY project running smoothly
Box contents: 1x 4.0Ah 18V battery, 1x charger AL 18V-44, box

42,90 €
10

Bosch

Bosch Akku und Schnellladegerät Starter Set 18V (1x 4,0Ah Li-Ionen-Akku; 1x Schnellladegerät; POWER FOR ALL 18V Alliance)

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8.5

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

Powerful 4.0 Ah battery: no memory effect, no self-discharge - always ready to use thanks to lithium-ion technology
Power for all battery and charger suitable for all Bosch Home & Garden devices of the 18 volt system
Power for all alliance: 1 battery, 10+ brands, 150+ devices
Long battery life - Ideal for extensive projects such as hedge trimming, grinding and sawing to keep your DIY project running smoothly
Box contents: 1x 4.0Ah 18V battery, 1x charger AL 18V-44, box

39,95 €