The LIDL Parkside one is incredibly cheap, at 19.99, for a 13.6 Li-Ion screwgun, with 26 bits. Li-Ion is the best battery technology available, within reason, maybe NASA have better batteries for spaceships or something but Li-Ion is very good. The LIDL one also has a 'clutch' which allows you to specify a lower power setting to avoid damaging workpieces.
