Battery Powered Chainsaw - 40V MAX* Lithium Ion battery is always ready and holds a charge up to 18 months Battery chainsaw 12 inch bar and chain designed for smooth and fast cuts Electric chain saw- 40V MAX* 2.0Ah Battery provides over 60 4x4 pine lumber cuts on average per single charge Automatic oiling system for constant lubrication of bar and chain. Tool-less chain tensioning for fast and easy adjustments. Full wrap around handle for comfortable cutting in different orientations Battery state of charge indicator on this cordless chainsaw with battery and charger