Cylindrical Lithium Battery 21V 4000mAh Power Tool Battery Pack 5S2P 18650 Cells Compatible with Electric Wrench for Power Energy Storage 576g 119x74x68mm Flat Head Cap
18650 5S2P / 21V / 4000mAh
£76.88
Sale price
£76.88
Regular price
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This 21V cylindrical lithium battery pack is designed to deliver consistent power for electric wrenches and other power energy storage applications. With a nominal capacity of 4000mAh and a 5S2P configuration using product A grade 18650 cells, it offers a practical power solution for maintenance, assembly, or workshop tasks. The battery is built for repeated use, with up to 500 charge cycles supporting long-term value. Compact and lightweight at 576g, it fits comfortably into compatible tool handles and battery compartments.
This battery pack is assembled with precision to meet the demands of power tool use. The following sections detail its build, dimensions, and electrical characteristics.
This battery is intended for power energy storage applications, particularly with electric wrenches. It supports both home and professional use scenarios where cordless operation is needed.
This battery pack combines practical electrical specs with a robust design for repeated use. Its key advantages include a stable discharge current and a low self-discharge rate.
Cylindrical Lithium Battery 21V 4000mAh Power Tool Battery Pack 5S2P 18650 Cells Compatible with Electric Wrench for Power Energy Storage 576g 119x74x68mm Flat Head Cap
£76.88
Sale price
£76.88
Regular price
21V 4000mAh Lithium Battery Pack for Power Tools and Energy Storage
Features and Construction
Material and Build
The pack uses product A grade cylindrical lithium cells (18650-5S2P) with a flat head cap. The combination method is 5S2P, meaning five cells in series and two parallel groups, achieving a nominal voltage of 21V and a capacity of 4000mAh. The outer packing size is 20 x 30 x 40cm, and the product itself measures 119 x 74 x 68mm.Size and Practical Fit
Weighing 576g, the battery is portable and easy to handle. Its dimensions of 119 x 74 x 68mm allow it to fit into compatible electric wrench battery slots and other power tool compartments. The flat head cap design ensures secure connection with compatible terminals.Uses and Placement
Event or Professional Use
For contractors or technicians working on job sites, this battery provides a reliable 21V power source for electric wrenches used in fastening, assembly, or maintenance tasks. The 4000mAh capacity supports extended work sessions between charges.Everyday Home Use
Home DIY enthusiasts can use this battery with compatible power tools for projects around the house, from assembling furniture to minor repairs. The compact size and 576g weight make it easy to store and carry.Benefits and Buying Value
Reuse and Low Maintenance
With 500 charge cycles and a monthly self-discharge rate of only 30 microampere per hour, the battery retains charge well during storage. Charging at 2A takes just 1 to 1.5 hours, minimising downtime between uses.Why Choose This Product
This battery pack offers a direct replacement or upgrade for compatible 21V power tools. Its 5S2P configuration provides a balance of voltage and capacity, and the use of product A cells supports consistent performance over its service life.