hello, I wonder if anyone can help.I've been using the charger which I got with my 2nd hand Wisper for a couple of months without any problems .However it seems to have died, when I hooked up the battery to it last night no lights came on. The fuse still looks intact although I'm not really sure what to look for. The bike was a year old when I got it and I'm pretty sure the charger was bought new with the bike.Is this usual for a charger of this age?Any comments would be appreciated , even if its only to say that yes I need to buy a new one