Yeah Rick, I dont know if you are using the eflite 800mAh batt but I have found that they are not the best.... [&o] I have 3.
Definatley pick yourself up a volt meter if you dont already have one. Heres one for $10.50 shipped to your door: [link=http://cgi.ebay.com/Volt-Meter-Mutimeter-Amps-AC-DC-Voltmeter-Digital-OHM_W0QQitemZ180141523356QQihZ008QQcategoryZ73158Q QrdZ1QQcmdZViewItem]EBAY[/link] I am sure you can find a decent one at your local hardware store or Radio shack for under $20.
How many cycles do you have on the pack you are using? I have few on my eflite packs and they are already degrading quickly. Probably around 30-50 cycles and they are most likely crapping out due to my poor treatment of them.

Noah