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Voltage
The voltage output from the Laptop Ac Adapter provides DC to power your laptop. If the voltage does not match the input current requirement of your laptop, your laptop will not function properly. Both high and low voltage will affect the performance of your laptop, and effect your laptop battery life.
Polarity
A power tip will normally have an inner and an outer conductor. The inner conductor may have positive or negative polarity. Based on the polarity you will need to carefully select a Laptop Adapter. If the positive and negative polarity is connected in the wrong way it will cause severe damage to your laptop. Most of the
AC adapter have standardized polarity symbols labeled on them, which helps you to buy the right Laptop power supply.
