I use one of our 3/8" house-brand battery impacts pretty much every day. And I encourage my minions to use it... With a 6-point socket, you can change the average battery in just a few minutes, without worrying about stripping stuff out, or having a hold-down nut that takes several minutes of ratcheting to get it off the rust. It takes out the Ford and Chevy crossmember brackets in seconds. We aren't supposed to change batteries in Ford trucks or Chevy Impalas, etc., but we do anyway, because we can have the offending blockages out of the way in almost no time.