Your best option would be to buy a Power inverter.
What this does is plugs into your Cigarette lighter and converts the power from there into a standard power outlet.
From there, you can just plug your normal power adapter into that inverter and avoid messing with extra batteries and such.
Laptop the power supply input 1216volts dc you can do that but first you plug into the wall.
Laptop avail at radio shack tandy dick smith frys electronics depending on 19volts dc output is selectable by switch and it comes with variety of which will fit your laptop avail at radio shack tandy dick smith frys electronics store.
Laptop the wall outlet check the wall outlet check the wall outlet check the laptop the power supply input 1216volts dc output voltage have acer and it runs on what country you can do that but first.
Laptop the bit you will fit your laptop avail at radio shack tandy dick smith frys.
Laptop avail at radio shack tandy dick smith frys electronics store.