RYOBI CD18 CORDLESS DRILL

Until recently I was the very happy owner of a CD 18 cordless drill . Up to this point I have had 3 replacement chargers and now am faced with the irritation and expense of a fourth charger that does not charge . In any ones terms this is unacceptable . The last one which I purchased was very kindly ****** from a new drill box by the Ryobi Springfield depot (as there were no replacements in stock ) and sold to me at a sensible cost of R150.00 rand whereas previous replacements have been over R300.00. Please can someone explain to me what I am doing wrong or if it is a warranty issue . You will understand that once you are accustomed to using this type of tool it is a serious inconvenience to be without it . The machine is used for domestic c****s at home and not in industry . I have the following Ryobi tools: 4inch grinder, 12mm Hammer drill, Leaf blower, jigsaw, orbital sander and a chain saw. <br>