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The 2-pack of HartHart 20V 4.0Ah Lithium-Ion battery is an excellent addition, or start to any DIYer’s Hart tool collection. This battery is compatible with all Hart 20V power tools. It features Lithium-Ion technology to give you long-lasting and fade-free power to get you through any project you decide to take on. This battery is designed to be compact and lightweight for more maneuverability while reducing user fatigue. Whether you are maintaining your yard with Hart outdoor tools, cleaning and maintaining your car with Hart automotive tools, or keeping cool and entertaining with Hart lifestyle tools, the Hart 20V 4.0 Ah battery is there to provide the power you need when you need it with 4x longer runtime than the Hart 20V 1.5 Ah Lithium-Ion battery. Whether you’ve got one Hart tool or all Hart tools, this pack of batteries is a perfect addition to any size Hart tool collection.


  • The 20V one battery system allows you to interchange the battery on all 20V Hart products. It powers all Hart 20V tools, outdoor, automotive, and lifestyle items
  • 4X Longer Runtime
  • On-board fuel gauge
  • Battery chart that is on the back of the packaging
  • Works with all Hart 20V tools
  • Fade free Lithium-Ion power
  • Disclaimer: Compared to a 1.5Ah Hart Lithium-Ion Battery tested on a Hart Hammer Drill
  • This pack of batteries is sold as batteries only and does not include a charger or a tool.


  • Brand: Hart
  • Dimensions: 9.25 x 3.15 x 3.15 Inches
  • Includes: 2 x 4.0Ah 20V Lithium-Ion Battery