As with cordless power tools, you're paying for the convenience of not having to deal with a cord (or air hose). Of course a big battery is going to add considerably to weight and bulk. If you have a decent compressor, then you're probably going to save some money going with air tools, not to mention they'll be more compact. Torque should be torque but as you've learned, batteries die with use. Lithium is the way to go, along with high capacity batteries (measured in amp hours, more is better). Milwaukee has a 3/4" impact that puts out a "maximum" of 750 ft-lbs. of torque tightening and 1,200 loosening. The kit will set you back about $500. ;-) And they will be bringing out a 9 amp hour battery this fall. That's a big battery... As I'm sure you know, there are many grades (and price points) with tools. A few years back I used a spiffy, new Snap-On impact and it was pretty sweet. More than the average shade tree mechanic should probably spend though.

Back in May I bought a little Black and Decker one that ran off of a lithium battery. A full charge got me about 13 minutes. It went back. I got a plug in Sun Joe and it works well for my needs. My husband calls it "weak".

What's the best non back pack power sprayer? I have a 12 year old Rocket Sprayer, and need to replace it, am thinking about Spot Shot. Which is better or is there a better sprayer than those. Thanks for any replies.

Recessed in the wall do you mean? I like my LED candles, other than that idk. can be on a timer.