Black+Decker, 20v max cordless chain saw, 10" premium Oregon low kickback bar & chain provides smooth & fast cuts, includes one 20v max lithium 2.0 ah battery & charger, charger will charge battery in 5 hours, tool free blade tension system for improved ease of use & quick adjustments, lightweight design for ease of maneuverability & reduced fatigue, improved oiling system with clear window to gauge oil level, wrap around bale handle provides increased control & comfort, tool & battery will work with the 20v Black+Decker system, for replacement 2.0ah battery use #lbxr2020, tv #189-554, 2 year limited warranty.