An adapter or power supply is a device for generating the required voltage from an electrical network or other power sources. It is used to operate a laptop, netbook, phone, etc. As a rule, all devices are equipped with adapters, but there are situations in which it becomes necessary to purchase a new device.
Instructions
Step 1
Collect information about different brands and models of power adapters, especially for universal units. On the Internet, it is possible to read consumer reviews and consult with managers of specialized online stores.
Step 2
When choosing an adapter, pay attention to the main characteristics - amperage and output voltage. Power supplies usually have an output voltage of 15-20 V. A spread of 1-2 V with a device is allowed, but no more. With large voltage fluctuations, the power supply and the device may become unusable. A weak adapter will not damage your laptop or netbook, but it will burn itself out. Therefore, choose the best option.
Step 3
If you decide to opt for a universal power supply, please note that some device manufacturers build a protection system into their products. It does not allow them to work with adapters other than the original ones. These manufacturers include Dell, HP and IBM. Carefully study the brand of your device and select the power supply suitable for it.
Step 4
Pay attention to the connector, otherwise the adapter will become a useless purchase. The fact is that sometimes devices of the same brand have different connectors. If you are unsure how to identify the connector, consult your dealer or store manager. Tell him the brand and model of the device, and he will help you make the right choice of power adapter.
Step 5
Check the polarity of the voltage, which should match the portable device and the power adapter. Knowing all the technical components of the power adapter, find out which computer stores sell the model you need. You can also order a power supply in the online store.
