Oregon Cordless CS300-E6 Chainsaw Kit with 2.4 Ah Battery and Charger PowerSharp System - Sharpens on the saw, on the job, in seconds. From dull to sharp in as little as three seconds Brushless Motor - High performance; high torque and power for fast cutting with a 16" (40cm) bar Includes Tool-less tension system Instant Start - No gas-oil mixing, No pull cords, No warm-up & No emissions 40V Max Lithium Ion power for long run time Premium cell technology means constant no-fade power and holds a charge in storage for months Run Time - Cuts approximately 250 branches 2-3 inches in diameter on a single battery charge