Powering Servos

I am doing a project where I need to connect two servos, 6V each (FS5013R) to my Arduino. I was originally using the Arduino to power the servos, but later I found out that it was a terrible idea. I read that using a 4xAA pack would be good. Do I need two of these packs, one for each servo? Sorry, I'm a complete noob.

I'd say you should be ok with one. If they're readily available where you live you can always go and get a second one. If they're a pita to obtain (delivery time...) why not buy two ;). I always need more battery packs anyway, can never have too many.

Don't forget to join all the grounds together.