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How to select correct Laptop AC AdapterIf you are going to buy an Laptop AC Adapter you need to make sure that Adapter will give you the suitable voltage (V) and current (A) output. To find out the voltage (V) and current (A) your should turn laptop over and look for a label. On which you will find voltage and current required for normal operation of your laptop. If you laptop dose not has label with these parameters you can also find it on your original AC adapter. The Voltage (V) must be within 10 per cent of your original Laptop AC Adapters Voltage. The Amps (A) may be higher but they can not be lower. If you can not to buy original Adapter for whatever reasons! You may also purchase a universal AC Adapter, but you will need to work out the Watts (W) of your original AC Adapter. You should select the universal AC Adapter with the same Watts or next highest. You can easily find out wattage requirement for your laptop by multiplying the Voltage (V) by the Amps (A) - 30V x 1.5A = 45W. For instance, if there is no 45 Watt AC Adapter, so you will need to select the next step up.
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