1. dell d830 ac adapter
Dell Latitude D830 AC Adapter 90W 19.5V 4.62A Description:
Input: AC100-240V (worldwide use)
Output: DC19.5V 4.62A
Power: 90W
Connecter size:
Internal Diameter: 5.0mm
External Diameter: 7.4mm
With central pin inside
2. dell d630 ac adapter
Dell Latitude D630 AC Adapter 90W 19.5V 4.62A Description:
Input: AC100-240V (worldwide use)
Output: DC19.5V 4.62A
Power: 90W
Connecter size:
Internal Diameter: 5.0mm
External Diameter: 7.4mm
With central pin inside
3. pa3290u 2aca
Toshiba [...]

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Choose an Toshiba PA3290U-2ACA adapter with the same electronic  specifications as your old one. Make sure its plug size is compatible with the device you plan to use it with. To be sure, bring your device with you before you buy.
When replacing your old Toshiba PA3290U-2ACA adapter, look for one that matches the volts and [...]

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Although actually a power supply it is popularly known as an AC Power Adapter or laptop AC Adapter, such as pa3396u 1aca ac adapter. Laptops along with most other portable devices use Direct Current (DC), this also applies to rechargeable batteries which power laptops. Direct Current has a constant flow of electric charge in one direction [...]

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