ABSOLUTELY correct!!! The Acer Inconia A200, uses a barrel adapter for it's power supply. It has a 12 volt DC power output. The outside of the barrel (called the Ring) is negative and the inside (called Tip) is positive.
I uses a universal power supply with a max output of 1,300 mAh, (a.k.a 1.3 Amps) which work BEAUTIFULLY!!! Thanks, 'oldtuky03'!!! This item is also available @ Batteries Plus Bulbs.;-)