Greenworks GMAX 40V System offers a wide range of easy to use tools for the homeowner and those who just want more power. This 14-inch cordless chainsaw features a high speed brushless motor that delivers superior power and performance. This unit is light weight and easy to use, automatic oiler with an oil view window, and side access chain tensioning. The 14" .043 gauge bar and chain is suitable for medium to heavy duty applications. Compatible batteries currently include a 2 Ah (model 29462) and 4Ah (model 29472) battery and charger (model 29482). The 2Ah battery charges within 1 hour, so you can get back to work and finish the job. The 4 Ah battery charges within 2 hours.