What and where can I get the battery?
need a battery for my ae-1 canon camera. and what kind of battery?
The Canon AE-1 is a 35 mm single-lens reflex (SLR) film camera for use with interchangeable lenses.
Batteries Plus carries them. The one in my camera was the Energizer L544. Duracell model is the X28LB which is a Lithium-Ion Battery.
Make sure you only use a 6 Volt, there are a lot of similar sized batteries which are other voltages such as 3 or 12 volts. You do not want to ruin your camera.