The principles, when looking for a Hp DC359A Adapter.

1) Specifications output voltage and milli-amps

2) Regulated / Un-regular

3) Connector Size output polarity /

1) Output voltage and milli-amps

Try and find out its specifications for the HP DC359A Adapter. In the old adapter, Device wishing to provide or page of a notebook manual. The specifications are usually given as volts and milliamps (mA). Always try to find an exact match sheet. This is the safest way to go. When an exact match is not available a couple general rules of thumb to find a workable adapter.

Choose the closest voltage available. Safer to go lower the higher. Some devices can handle higher without much damage, but will not take it. If you choose more often the worst that could happen is not to provide proper voltage and equipment not normally be damaged.

Choose milliamps equal to or greater than the required

2) Regulated (Switching) and unregulated (non-switching) Output

Most AC adapters are not regulated output voltage power supply floats with the load placed on them. Some electronic equipment such as digital cameras or security cameras are very sensitive to input voltage and so require a Regulated / Switching adapter. An AC adapter guarantees that the regulated output voltage is always constant.

Do not use a source not regulated under Instead of a set!

OK to use a regulated (however generally pricer) in place of an unregulated.

Sheet output 3) Size polarity Output /

These are measured in millimeters. I'll try to give these measures as accurately as I can. If the statement is not correct for your application. Radio Shack or other supplier may have an adapter or plug plants may be amended to replace the card if you do not forget to check the polarity before connecting the equipment.

Output polarity

AC Adapters with a stand out this is not a problem however, any and all adapters DC should be observed or equipment damage will most likely occur.

To determine the polarity of the HP DC359A adapter look for a symbol this: I'll have the same symbol on my auction pages for adapters.

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