I've got the Bosch 14.4v model 32614-2G.
http://www.boschtools.com/tools/tools-detail.htm?H=175970&G=54647&I=67512
So far it has been used to build a raised-bed garden (lots of screws and big holes for that project) it's been dropped in dirt, mud, on the concrete.. and still keeps on ticking...