HTC Touch battery issue

[ObsoleteE]

I have had my Touch since Feb of 2008 and the factory battery was starting to show signs of age. I bought a new battery off of Radioshack.com last week. I charged this battery to full as per the instructions. This thing sucks! It dies faster than my 15 month old battery that came with the phone. The brand name of the new battery is Dantona Industries. The new battery is 1100 mAh just like the old one. Radioshack expects ME to pay shipping to send this back to their warehouse. This means I would have paid shipping two times and got nothing out of it. I am posting this to see if there is some sort of test or trick to try before I have to pay RS AGAIN for nothing. Thanks!