how to buy Dell Latitude D620 AC Adapter ?

FOR IMMEDIATE RELEASE
(Free-Press-Release.com) December 14, 2009 -- While an AC adapter with a higher power rating will allow for faster battery charging times and increased electrical loads, an AC adapter with a lower power rating may suffice, especially where there is a concern about excess heat or higher cost.

such as : Dell Latitude D620 AC Adapter(http://www.udtek.com/dell-latitude-d620-ac-adapter-65w-195v-334a-p-3113.html )

Dell Latitude D620 AC Adapter 65W 19.5V 3.34A Description:
Input: AC100-240V (worldwide use)
Output: DC19.5V 3.34A
Power: 65W
Connecter size:

Internal Diameter: 5.0mm
External Diameter: 7.4mm
With central pin inside
Item Includes: AC Adapter and Power Cord.

AC adapters with higher power ratings also give off more heat than adapters with lower power ratings. If excess heat is a consideration, an adapter with a higher power rating may not be suitable for the application.

If an electrical device contains a rechargeable battery, an AC adapter that has a higher power rating will allow for faster battery charging: An AC adapter with a higher power rating will allow more electrical current to flow, allowing more of the spare electrical current to flow into the battery.

Cost may also be a factor. Usually, since AC adapters with a higher power rating must be capable of delivering more electrical current for the same amount of voltage, the components required to assemble an AC adapter must be more robust than that of a lower-power-rated AC adapter.

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