The voltage on mine tends to be very low. 95 to 107 VAC.

If the voltage is low, the amps go up to try and maintain wattage.

I suspect your laptop was under-volt and drew too much current through the light-duty power adapter that came with it.

Here's a thought. Why not get a 12v cigarette lighter adapter for the next one?
Your laptop probably has a 12v battery, or very close in the first place! ???