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The 2-pack of HART 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. 


  • This tool features a powerful motor delivering up to 4,400 RPM making polishing your vehicle a breeze.
  • For extended use, this tool features a lock-on switch which helps reduce user fatigue.
  • The elastic buffer bonnet makes switching pads easy, quick, and convenient so you can spend more time caring for your car.
  • With a HART 20V 4.0Ah Lithium-ion battery, this tool can run for up to 5 hours leaving you with plenty of time to get the job done.
  • This tool runs on any HART 20V Lithium-Ion battery to provide long-lasting fade-free power to get you through whatever project you tackle! This buffer comes with an applicator bonnet and a buffing bonnet.


  • Brand: Hart
  • Buffer Size: 6″ 
  • RPM: 4,400 RPM
  • Battery: 20V Lithium-Ion