I can only share this with you and it may be of no use to you JJ, I needed a drill once to put up some pictures, they were the sort you drill onto the wall, I bought a 'Challenge' battery charged drill in Argos, I know nothing about drills to be truthful, but when I had finished using it, realised there was no need for it, so I put it back in box, all it's accessories and paperwork, dropped it back into argos, told the staff member it didn't work for me, wasn't powerful enough (it was brilliant) she just took the receipt and the drill and refunded me - I'm not suggesting you do that, it was the best thing for me at the time ;)