I went on eBay and bought a 5 piece accessory kit for my Fascinate. It has a wall charger, 2 1500 mA batteries, USB charging cord, and a car charger.
Total cost of $29.95 with free shipping. I happened to have a very tiny fanny pack and converted that to hold all of my cellphone paraphernalia now.
I am not going to get a bigger battery. Just flip in a new battery if I get caught short. I used my tape write to identify the batteries with a number. 1, 2, 3. That way if #2 dies, I pull out #3 and bootup the phone again. #1 is already dead or in the charger if need be. They all get exercised that way once in a while.
I sit a a desk a lot, when doing so, I just plug into the USB cord to the laptop and leave it charging. The BT headset is on also, so with the display configured to stay awake while on charge, that makes the thing a desktop communications center while I am working.
Next thing I am fixing up for it is a support to hold it at about 45 degrees for easy reading thru the day.