High Performance G-MAX 40V Lithium-Ion Battery delivers fade-free power with no memory loss after charging20 cm (8\") bar and chain for easy trimming of branchesEasy adjust chain tensioning system for quick tightening of the chainAutomatic oiler applies oil to the bar and chain to ensure durability and extend the life of the chainTranslucent oil tank for clear view of oil level3-piece aluminum shaft can be extended to 2.4 m (8 ft.)80 cuts of 10x10 wood on a full chargeComes with 1 G-MAX 2Ah Li-Ion Battery for up to 50 minutes run time