KATSU FIT-BAT Cordless Tools Range they all take the same battery, works on both 18V or 21V, compatible with LXT range, use your current or easy to find on line (compatible with BL1850 BL1860B BL1855 BL1840 BL1830 LXT-400 BL1820B BL1815) With brushless motor the battery lasts almost twice longer than normal brushed motors, in addition it is maintenance free Powerful 550W motor with no-load speed of 400rpm ideal for felling small to medium-sized trees and cutting logs 12" bar with 20m/s chain, 20cm max. cutting diameter Tool-free chain tension adjustment and automatic chain. lubrication system Ergonomic handle with a soft grip surface for a firm and secure hold during use. Specifications: Power: 550W Motor Type: Brushless No-load Speed: 400rpm 12''/30cm bar and chain Chain speed: 20m/s Automatic chain lubrication Chain Pitch: 3/8"" Without battery and charger Can be used for wood cutting, pruning, harvesting, chopping wood, etc. Check other modes in our store.