Review on AOBEN 21V Brushless Cordless Impact Wrench With 1/2" Square Driver, Max 300 Ft-Lbs Torque (400N.M), 2X 4.0Ah Li-Ion Batteries, 6Pcs Impact Sockets Set, Fast Charger And Tool Bag by Brandon Roberts

We've only had this for a day, so I can't speak to the life of the product or battery, but so far my husband is very satisfied with the product. He used it to take the blades off the lawn mower-the largest socket included fit our mower, it made the job much easier and faster, and removed the center bolt without spinning the blades (when he does it by hand the blades always try to turn and he has to wedge a piece of wood to hold them with one hand while the other loosens the bolt in the center.) The battery is tight to remove, and it took a minute to figure out how to charge it, but the charger plugs directly into the battery once it's removed from the impact wrench.