Selection of the Ac Adapter for laptops

At the selection of the Ac Adapter for the certain model of notebook module quite not necessarily to search Ac Adapter, identical to that, was initially supplied together with a notebook.

In order that the power module purchased separately was able normally to work with your notebook, implementation of the followings terms is needed:

Voltage, issued by power supply must approximately coincide with your consumable notebook. (The difference in 3 - 5%, for example, 19Volt instead of 19.5, unprinciple.)

Maximal power, given out the power module, must be not less, than consumed by your notebook.

The same type of connector. The vast majority of modern notebooks have the connector to connect Ac Adapter, which plug is inserted into a hollow cylinder, which is described by three characteristics - the outer and inner diameter, as well as the polarity (where on what side of cylinder, the inner or outer is positive, and on what - minus). All these characteristics must match.