Laptop charger

India
January 20, 2009 6:40am CST
I think the normal laptop charger is 70W but i have seen 80W, 90W and even 100W why there are many models for the same 18V 3.5A. What is the use of having higher wattage charger.
1 response
Yoshi_
@Yoshi_ (156)
• Australia
20 Jan 09
Wattage is the ammount of electrical power an appliance draws. Some laptops draw more power than others. Usually the more high end ones with more powerful cpus draw more power than a low end laptop, thus needing a power supply with a higher wattage rating.
saichandtalluri
@saichandtalluri (1486)
• India
20 Jan 09
OK but i all the Laptop battries of one company are alike just take the example of HCL laptops we can find the rating the battrey for all mobels of HCL are same but the chargers are different wattages.
Yoshi_
@Yoshi_ (156)
• Australia
20 Jan 09
It's not so much anything to do with the battery. The wattage doesn't make a whole lot of difference when charging a battery. It's really mainly for just when running the computer on mains power.