SKIL PWRCore 40 Brushless 40V Self-Propelled Mower Kit with 5.0Ah Battery and autoPWRJump Charger. Self-propelled lawn mower includes 5.0Ah Battery and Auto PWRJump charger. The digital brushless motor provides efficient, high-performance power without the hassle 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 30 minutes (based on a 5.0Ah battery). Variable speed easily adjusts the propelled speed based on the task at hand. Get started quickly and easily with a convenient push-button start. Lawn mowers telescoping handle folds easily for convenient vertical storage. Choose between bagging or mulching grass. 7 settings to quickly adjust for your preferred grass height. All the tools within the SKIL OPE line are a part of the 3-year warranty plus 2 year with registration 5 years.