Implant,
It is my understanding you have a charger issue and not a battery issue. Here are my comments:
1. Low ac voltage supplied to your charger makes it work harder and run hotter. Make sure you are not using an overloaded ac circuit where another device is also drawing high amps at the same time. A quick ac voltage test at the receptacle while the charger is running may be in order.
2. If you are using an extension cord on your charger, ensure it is of proper gauge and not unnecessarily long.
3. The heat rejection capabilities (design) of your charger always caused me pause. The off board charger Relion supplied me with in my bundle has an internal fan that runs while charging. It is a Pro Charging Systems, model I4818CH, and has a custom Relion charge profile loaded from the factory.
http://pcsdv.corecommerce.com/Eagle-...e-i4818CH.html