can this be used in conjunction with 2 linear actuators?
Which two liner actuators?
looks like 2 PA-02 Linear Actuators by Progressive Automation. Each will have a 12 inch stroke. This will all be powered by a 12V battery.
Also, are there any preferred 12V batteries to use with an Arduino and/or this Pololu Motor Driver?
but any battery can be hooked up to it, right? this is somebody elses part of this design project. Just curious.