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20V 4.0Ah Battery


With 4X longer runtime*, HART’s 20V 4.0Ah battery is compact and lightweight. The battery features an on-board fuel gauge so you know exactly how much charge you have. It is compatible with all HART 20V power tools and features lithium-ion cells for fade-free power and longer-lasting performance. Includes (1) 4.0 Ah battery.
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  • 4X Longer Runtime*
  • On-Board Fuel Gauge
  • Battery chart that is on the back of packaging
  • Works with All HART 20V Tools
  • Fade free Lithium-Ion power

HART 20V System

Battery compatibility is key and HART’s 20V system allows all your 20V batteries to work with all your 20V tools including power tools, lawn and garden and automotive. Our Lithium-Ion batteries are fade free so their power won’t fade during use. They’re compact and lightweight for user comfort. Check out our full and ever-expanding lineup of 20V tools to get your collection started.

  • HART 20V System
  • Introducing HART Tools


20V Lithium-Ion
  • 4.0Ah 20V Lithium-Ion Battery

Thank you for your purchase! Let us know what you think by posting a review. We always appreciate the feedback.

Warranty Information

All HART Power Tool and Lawn & Garden products are covered by a 3-year limited warranty; Hand Tools (tape measures, hammers, pliers, etc.) are covered by a limited lifetime warranty. Click on the link below for specific warranty details.

Warranty Info

Customer Support

If you have a service-related question or have issues with a tool, visit our support site, where we will be honored to assist you.

Get Support
*Compared to a 1.5Ah HART Lithium-Ion Battery tested on a HART Hammer Drill
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