Don't wanna burst your bubble, but I used to own an NX80, and curious soul that I am I opened the battery compartment and pulled the battery out shortly after purchasing it. The battery technology is the same as what we've been working with: lithium polymer. It will have the same "malformed gel pack" look that you describe. Granted, Sony makes premium polymer batteries, but I wouldn't bet on it fitting the T3. If the sizes are exact, then as per klw's own experience, it's tricky to get anything wider than 34 mm into the space because of the T3 circuit board, and the battery is slightly above 36 mm. Yeah it might sound like I'm trying to dash your hopes, but on the other hand you spent 9.95 on a battery which you are finding has little difference from the original vs. considering spending over 30 for a battery that has little chance of fitting. When I get my battery I'll report my findings, you may just have a dud and will have to buy another Kokam... or we'll both be left with that wonderful, what-the-hell-did-I-go-through-all-the-trouble-for-feeling. And in that case, at least we'll be in the same gripe boat together.