I also bought the Panasonic Lumix DMC-TZ3. I decided I wanted to have a back up battery for it and found out on the Panasonic web site it was about $51.00 so I checked on line and found it there for $9.95 plus $5 shipping. I ordered it and it come pretty quickly and it works great. Thought I'd pass it along for those that may be hesitant to buy it on line.
Battery for Panasonic