EXTENSILO battery for Worx such as WA3551.1 etc. 20V, 2.5Ah, Li-Ion

• High-quality replacement part with the best price/performance ratio


• Reliable functionality and full compatibility with your power tool


• Precision manufacturing for easy installation in your device


• CE RoHS - Meets all operational safety requirements


• No memory effect

If the other technical specifications, such as voltage and connectors, are compatible, the battery is suitable. A battery's capacity is measured in milliampere-hours (mAh). If the replacement battery has a higher capacity than the original, it will provide a longer runtime. If the capacity is only slightly higher or lower than the original battery, there will be no significant change in runtime. You can use batteries with different capacities without any problems.
State-of-the-art lithium-ion cells for optimal device performance

Lithium-ion batteries are among the most powerful batteries available. Compared to NiMH batteries, for example, they are characterized by low self-discharge and higher energy density. They are not subject to the memory effect and require little maintenance, as they do not need to be regularly discharged. With proper storage, Li-ion batteries have a long lifespan due to their durability and high number of possible charge cycles.
Lithium-ion batteries are used in mobile devices with high energy demands, such as smartphones, laptops, cameras, and power tools. They are also used in RC model making and photovoltaics.

Product safety information:

This product was manufactured in accordance with EU regulations. It meets, among other things, the requirements of Directive 2011/65/EU (RoHS) as well as the CE marking obligation.
Production takes place in compliance with the relevant regulations. Product safety, environmental compatibility and quality assurance.

Scope of delivery

1x battery