I appreciate all the advice, you guys have been extremely helpful. As of now, neither one of my Lipos work anymore. I had two of them that came with my planes, one for my Mirage 2000 and the other for the F-18, both batteries are shot. Although the Mirage battery is not puffed up, it only gives my plane just under a 2 minute flight on a full charge before shutting off and forcing me into an emergency landing. It appears from coming to an overall conclusion about what you all have said, I think I may have ran the batteries down too much. I did have the F-18 at full throttle for a while, lucky if I got a 4 minute flight before the battery died and forced me into an engineless approach. So let me see if I understand another thing correctly, never let a Lipo battery drain to the point that your aircraft motor shuts off? I maybe simply be flying the planes too long if this last question is correct. The F-18, well I guess with that one I think I got too carried away at full throttle and pushed the plane to its limits possibly overheating the battery up too much and letting it die for the 3rd time which may caused it to fry. I am going to pickup a couple of 2000mah lipo batteries that have a little higher C rating and I think those will be alot better.