Changing a battery is not a big deal. Everything from your cell phone to your car uses a battery, and all such batteries will eventually be replaced. As for which Canon FD camera to get, the EF is a good camera; inexpensive, and styled after the F1. The FTb is a great camera, and is fully manual. The meter requires a battery (just as the EF does), I simply got an adapter which allows me to use an SR44 battery stepped-down to 1.35 volts. If you have a little extra money to spend, the F1 is the way to go. I prefer the old F1 to the newer versions, they have a certain look to them which I like.