can i use a 65w charger instead of 90w if output is same (19.5v)

[Gouriraz]

can i use a 65w charger instead of 90w if output is same (19.5 V) in dell vastro 1088.

 

[Karsten75]

Sure, if you don't mind the charger burning out because you're overloading it.

 

[USAFRet]

Sniff sniff...I smell smoke.

 

[RobotUnicornZombie]

Short answer: No, you can't.

Explanation: Ohm's Law states that Voltage is directly proportional to Current and Resistance (V=IR). Watts is a measure of Voltage*Current (V*I). If you increase the number of Watts without changing the voltage or the resistance (which won't change since you're only using 1 circuit, your laptop), then the current will increase. The 65W charger won't be able to handle the higher current and will burn out.