PPCGeeks - Touch Pro getting HOT on charge

I really need some help with this. This hasn't become an issue until yesterday. I'm running MightyRom5 on my Sprint Touch Pro with a Seidio Innocell 1500 mah battery. I fell asleep on the couch with Opera running in a low signal area and when I woke up the phone was dead. I took my charger with me to work at UPS and plugged it into a PC there to let it charge. It wouldn't charge because the phone got too hot being out in the hub so I took it upstairs to an office and let it charge there. It took quite a while to get it fully charged. Around 8:30 pm or so, I was using it to show a 15 min video to some coworkers. After the video, it showed 80%. I didn't use it at all except to check the time once in a while. By 11 pm, it was totally dead. I charged it at my g/f's house overnight with the phone off. On the 20 min drive home, it went from 100% to 70% in that span of time with no programs running and the screen off. I switched out to the stock battery earlier, let it charge, and I had the screen on so I could see the battery charge. It got to 90 % about 20 minutes ago, then I looked again and it had dropped to 60% and was running damn hot and was no longer charging. I know that at a certain temp the phone wont charge anymore, but what is going on with this? The last thing I installed was Pandora (which I uninstalled cuz it blows) and Calkulins SprintTV fix. I've been running MR5 for a while and haven't had an issue like this. Does anyone know what could be causing this? If you need any more info to help, please let me know. Thanks for the help.