shareebacha
New Member
I have an adsl modem and i have was just wondering if i can use a battery to make it work. The power rating of my modem is 9V DC and 0.5 A.
Now the question:
1) Do I have to connect a battery providing current exactly 9V, 0.5A?
2) Or can i put any supply as long the output is 4.5W? (I read somewhere on the net that power = Volt x Ampere)
3) And what factor determines how long a battery will last. Like a battery working in camera will drain much faster than it is in any other device.
I am a total noob so please an explanatory answer would be quite good.
Now the question:
1) Do I have to connect a battery providing current exactly 9V, 0.5A?
2) Or can i put any supply as long the output is 4.5W? (I read somewhere on the net that power = Volt x Ampere)
3) And what factor determines how long a battery will last. Like a battery working in camera will drain much faster than it is in any other device.
I am a total noob so please an explanatory answer would be quite good.