SKIL PWRCore 40 40V Brushless 14 In. Chain Saw with autoPWRJump Charger. The digital brushless motor provides efficient, high-performance power to cut through tough branches and stumps without the hassle and maintenance of gas. Industry leading PWRCore 40 lithium battery technology wraps each cell with cooling material to keep the battery powering on for 25% longer run time and 2X battery life. Auto PWRJump charges the battery from 0-30% in just 15 minutes (based on 2.5AH battery). Adjust the chain on this cordless saw with a convenient dial on the side of the tool. Auto-lubricating keeps your chainsaw running efficiently and effectively by reducing friction. Anti-kickback brake cuts the power when kickback occurs, so you can work with confidence. All the tools within the SKIL OPE line are a part of the 3-year warranty plus 2 year with registration 5 years.