the answer is yes as long as the device works on dc current and not ac current if you tell me what the device is i might be able to help further
In order to use the "plug in" pest control with a 12V battery, the device would have to have power requirements less than or equal to that which a 12V battery can provide. The pest control would also need an adapter to use the 12V battery.
No.
The AH means Amp Hours and is a measure of how much electricity the battery can store. Thus if the 12AH and 15AH batteries were connected to THE SAME device (one after the other) the 15AH battery would run the device for longer than the 12AH battery.
can a 12v lawn mower sealed battery be charged with 12v battery charger use on cars
yes
The adapter's voltage must match that of the device, and its current-rating must exceed that of the device. So the answer is yes.
The battery is a 12V car battery.
Yes. You will need a voltage regulator circuit to produce the 7.2v from the 12v source.
Yes just as long as you don't exceed 10Ah rating you will be ok.
12v
No, you can not charge a 3V battery with 12V charger.
No, the new adapter will not be able to safely supply enough current.