RE: Is it dead?
Sounds like you didn't know that much about lipo's when you bought it. You have to use a lipo charger and be careful to NEVER run it when it gets slow. Thats when you will start to damage it. Submerge it in saltwater and that will discharge it. Then, if you want to discard of it properly, then get a shoebax full of sand and burrie the batt in the sand thats in the box. If it explodes or emmits a faint electrical charge, the sand and the box will help stop the explasion or charge from causing a fire or damaging your property. You could also take it to one of those battery places.
Cheers