ORIGINAL: gi1mo2
You must be using LIPO batteries with your Cx2. Don't charge with NiCd. You could cause a fire or explosion...
I've read where many people have successfully ressurected LiPo's using a low amp NaCd charge momentarily.. I'm talking .1 amp for 25 seconds or so. Search it.
http://www.rccrawler.com/forum/showthread.php?t=251562