Beren, They have to pass Aust. Safety Standards. Try Jaycar as Geoff has suggested. With power supplies of any kind, it's always better to have more available than you require. That way when you want to use it for a diff. app. you have the power avail. A 100 w. will drive your comp.+ TV O.K. but I suggest the next one up. This way the unit is not overloaded(working hard), it will just be idling away and hardly notice your laptop. Unless you have a specific use for the 650 w model?(Too big)! BE WARNED tho, they love lots of Amps. from your battery.
Why not use a comp.power supply? Jaycar part #MP-3462 @ $89.50? Adjustable volt out @ up to 3 Amps. L.
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