The ego 56v power cordless saws are powered by the ego rechargeable 56 volt lithium ion battery system available in sizes, 2.5ah, 4ah, 5ah, and 7.5ah.the ego cs1600e is fitted with a high quality oregon bar chain. Oregon is the world's leading manufacturer for quality and efficiency when it comes to chainsaw bars and chainsaw cutting chains. The cs1600e has a 16 inch 40cm bar length suitable for most domestic jobs.the efficient ego brushless motor is lightweight and compact in design produces low vibrations, a longer run time and overall extended motor life.the ego range of power battery operated gardening tools were introduced to the uk market during the spring of 2015. These cordless garden products have been a major success in north america with their 56 volt lithium ion batteries which are comparable in performance to petrol powered machines.recent consumer research has shown an increased interest and demand for outdoor power tools which are quieter and less environmentally polluting than traditional petrol driven models.the ego power plus cs 1600e saw be used with all size batteries in the ego power range.please note does not include a battery or chargerfeaturesauto chain oilinganti kick backtool free chain tensioning the quick chain tensioning requires just a quick rotation of the tension wheel so there'll be no down time.brushless motorspecificationsmodel cs 1600etype cordless chain sawchain bar length 40cm 16 incheschain speed 12m sweight 3.76kg without batterywarranty manufacturer's 5 year