20V 4.0Ah Lithium-Ion Battery Pack, 40A Power Tool Replacement

20V 4.0Ah lithium-ion battery replacement delivers longer runtime and stable power so you can keep cordless tools working without frequent swaps. Built with premium cells and a high 40A max output, it supports demanding jobs and high-load starts. Multiple built-in protections help safeguard both battery and tool, while quick charging gets you back to work faster. Ideal for refreshing worn packs or adding a spare for uninterrupted workflow.

• Delivers consistent 20V power with up to 40A max output for high-demand cordless tool use.


• Extends runtime with 4.0Ah (4000mAh) capacity to reduce downtime and battery changes.


• Protects your tools with overcharge, over-discharge, and short-circuit protection.


• Supports quick charging to minimize wait time between tasks and keep projects moving.


• Fits many 20V cordless power tools as a replacement or upgrade battery pack.

Keep a fresh battery on hand for longer projects, busy job sites, or time-sensitive home maintenance. This high-capacity pack is designed for reliable output under load, helping tools run smoothly when cutting, drilling, cleaning, or fastening. Built-in safety protections support stable daily use, while the compact, portable form factor makes it easy to carry as a backup. Replace an aging pack or add an extra to your kit—grab yours today and stay powered up.

• Rated voltage: 20V


• Capacity: 4.0Ah (4000mAh)


• Max output current: 40A


• Cell configuration: 5S1P (5 in series, 1 in parallel)


• Dimensions: 5.7 x 3.0 x 2.2 in (144.4 x 76.0 x 54.8 mm)


• Net weight: 1.1 lb (500 g)