for full sized tools,i used the 18v dewalt ni-cad set for years, then when makita lxt 18v lithium was introduced i switched to them. i dont know exact dates but i am shure its been 3+ years of fairly severe use and they are great performers. i just recently switched over to the 20v max lithium dewalts and thus far i like them , they seem to work well and of course awesome power // battery life. but i have less than 3 months on em and not made it through a busy season yet, so hard to be objective on them just yet. as for the small type tools i use the bosch 12v / 10.8v (older) and the 12v hitachi for mini impacts and mini recip saws both are great performers with 2+ years of toolbag riding so they get very large amount of use . my 2 cents .. maybe 3 cents worth
I just wanted to give the results of the first on the job test of the Bosch 12V impact that I was using. It was nice and light, didn't feel it going up the ladder. The unit we were working on was a freezer put in before Christ, old, painted-over Robbie screws holding it together along with the block of ice we were chipping away at (heater replacement that was way overdue). It mostly got the screws that I could get a straight shot at, but a couple of the ones that were already a bit stripped needed to be chiseled off. For one of them, I was wishing I spent the extra $90 on the 41 model as the 40 was a bit too long to get at it and it was so iced up that it would have taken the Pope, the Patriarch and the chief Imam to get us to move it with a stubby. Since the 41 model is almost short enough to be a right angle, it probably would have got it. Of course, we replaced all that junk with 5/16's.
The Cpmpany I work for uses the Big 24V Rigid tools. They have a Lifetime Garuntee if you register them Online. So far none of the tools have to be replaced and only 2 Battrays. We live in a real cold climiate and leave the tools in the truck where it gets below 0. I bought a small ridgif 12volt drill to put in my service bag for taking doors off changing parts and it works awesome. I treat the thing like a $2 (Gardening HOE) and she loves it. If I was to buy my own tools I would buy Makita cause I have one of the first ever made Mikita cordless drills and it still works like A champ think its like 9Volt or something LOL like as old as me.
I have been using the Bosch PS21B 12V Max 2-Speed Pocket Driver. I like it alot. It fits into my bag perfectly and it really dosnt weigh much at all compaired to other drills. I can get about a weeks worth of battery out of it. The battery only takes about 30 mins to charge it, its a lithium ion battery. It cant do big jobs like drill into the sides of homes or concrete. but I have other drills for that. the two speeds can get you though any over tighten screw.