I have this 6 year old issued stinger that has been replaced by a new one which is in better condition. I fixed the old one up and got it to work but not charge. Tighten the rear charging pin enough to charge and it won't light. There doesn't seem to be a sweet spot either. It got a steel wooling of the contact pins and a light touch of grease so I doubt its a contact problem in that respect. I also substituted the tail caps and front assys and it has no effect nor does the batter pack. The charger is the same one it came with and it works fine. Any repair ideas???? Forget the warranty as I got this as a govt issue item and that tosses the warranty. I just want it for an extra around the house light.