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Types of Laptop Adapter Connectors

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A laptop power supply is often one of the most damaged components. Some of the most common problems occur from overvoltage and breaking the power cord or the connectors at the end of the cord, by either excessive bending or jamming the connector into the laptop. Manufacturers offer a variety of power supplies, but how do you know which one to choose?

The most common types of connectors

Connector typeIntended for:Connector illustration
2.48/0.70 mmAsus EEEAsus EEE Connector; 2.48 / 0.70 mm
4.0/1.70 mmDellDell Connector; 4.00 / 1.70 mm
4.80/1.70 mmHP/Compaq, Delta, Asus, Nec, HP Elitebook, Envy Spectre XT seriesHP / Compaq, Delta, Asus, Nec, HP Elitebook, Envy Spectre XT series connectors; 4.80 / 1.70 mm
5.50/1.70 mmAcerAcer connector; 5.50 / 1.70 mm
5.50/2.10 mmAcer, Liteon, Nec, GatewayConnector Acer, Liteon, Nec, Gateway; 5,50 / 2,10 mm
5.50/2.50 mmIBM, Asus, Dell, HP / Compaq, Delta, Toshiba, Liteon, Gateway, Nec, FujitsuConnector IBM, Asus, Dell, HP / Compaq, Delta, Toshiba, Liteon, Gateway, Nec, Fujitsu; 5,50 / 2,50 mm
6.30/3.00 mmToshiba, NecConnector Toshiba, Nec; 6.30 / 3.00 mm
7.40/5.00 mm + pinHP / Compaq, DellHP / Compaq Connector, Dell; 7,40 / 5,00 mm + pin
7.70/2.50 mm + pinAppleApple Connector; 7.70 / 2.50 mm + pin
7.90/5.50 mm + pinIBM / LenovoIBM / Lenovo Connector; 7,90 / 5,50 mm + pin

9.50/3.50 mm + pin

Apple PowerBook, iBookApple PowerBook Connector, iBook; 9,50 / 3,50 mm + pin
DELL 3 PINDellConnector; DELL 3 PIN
HPHPHP Connector
Apple MagSafeMacBookMacBook Connector; Apple MagSafe
Square yellowLenovoLenovo Connector; Square yellow
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