Should i change the battery?

[arinaturcu2]

I tryed to charge my laptop with a 19V adapter instead of 20V. Now my laptop doesn't charge needer with his adapter witch has 20V. The light that turns on when the charger is plugged in (usually blue) is now red and flashes.

 

[darksky1x]

Flashing red light means a bad battery. Replace a battery and GET THE PROPED CHARGER.