In reply to Jack Geldard - UKC Chief Editor:
Horses for courses, like always.
Pay a shedload for a Hilti, drills fast but the battery electronics have a certain reputation! The 24V version is the better.
The 36V Makita drills well but needs a new charger every now and again and the batts are pox.
Good old GBH24, still going strong after 17 years on the original battery. Ni-Cad´s are heavy but last and last and last and l....
36V Bosch is undoubtedly the fastest driller but a real monster to hold and one handed overhead you need to be strong! I haven´t tried the newer, smaller version.
Metabo-the one I have is quality built and the slowest thing I´ve ever used!
Panasonic are probably the most universally praised but I´ve never used one.
Currently I use a 14.4V Makita for nearly everything, with 5 batteries! Brilliant for lead bolting and steep stuff. I get 7 holes per battery and its even got a light for those tricky night descents!
The Metabo stays at home.
The Bosch is the ever reliable backup.
My brothers Makita gets cursed, often and always!
If weight matters and money not then Li-ion but two or threee years is all you get, Ni-Cads seem to last for ever and Ni-Mhd sort-of in between.
And there are restrictions on carrying Li-Ion batts in aircraft since 2009.
Jim