I have two battery drills.
A rather expensive Makita 18v that I have for work and a little Red Devil (power devil) as I call it.
Both work very well and I often keep the red devil for the caravan as it is a bit lighter and the charger base is smaller making it more convienient to store. At 16.8v there is little difference except with the makita you do get two speeds. However the devil copes well and is only a few seconds slower.
I rely on power tools all the time as I suffer from arthritis of the back and shoulders which eliminatesand screw driving etc.
Best of all my red devil came totally free of charge about 7 years ago fro my local DIY at Hereford. You see, they were so interested in stopping theft of batteries from these drills that they forgot to pass the drill box through the till scanner. I didn't realise until we got home as we had spent
Like most here I use my one and only cordless (18v Bosch)for everything. The battery life is stupendous. I use the torque settings but I manually "*** them up" for a good solid finish.Reg, spray white grease is available at Halfords, B&Q or any motor factor outlet