Help Sudden Battery Life Issues

[TheKong]

I've had my phone for roughly a year and a half. I've had no serious issues with battery life until 1 - 2 months ago.

Typically I charge my phone via usb while I am at my computer through the evening, and it then remains off the charger until the next evening, unless needed at which point I will use either usb or wall charger. I can charge my phone up full and it will last me approximately 18-20 hours, mostly being idle, sending and recieving occasional IMs and SMS messages. If I do anything like make calls life decreases.

Now here is the big thing, if I enable data (not wifi) and try to do something like facebook or browse the net my battery within a min or so drain completely to red and force the phone to shut down.

As always I keep apps up to date. The only changes I've made to my phone are...

• New SD card, 16gb class 10
• Rooted the phone with superoneclick 1.7
• Installed terminal emulator
• installed titanium backup
• Installed App cache cleaner
• Installed Adfree
• Removed several system apps (safe ones; twidroyd/ubersocial, samsung apps, layar, daily breifing, allshare)
• Moved all apps, except avg, to sd card

I didn't change or do anything else (other than attempt to update superuser (but reverted back due to binaries not wanting to update). I don't know if it's the phone or the battery. Not sure if or where I can get another battery to test it.

Any and all suggestions or help is appreciated. If there's anything you want to know just ask and I will do what I can to provide that info.