FACT: HP are a bunch of annoying little so-and-sos for changing the plugs on their power adapters for no good reason. I borrowed a HP power adapter from a friend this morning....the machine's original power adapter, from 2002 is 18.5V, 4.9A, centre-positive. My friend's power adapter, from 2004 is 18.5V, 6.5A, centre-positive. Which means its electrically compatible. But not physically compatible. The plug on my friend's power adapter is slightly bigger. This is despite my Dad's new Toshiba Satellite from 2009 using the exact same power adapter as his Toshiba Tecra cicra 2003, and despite Apple back in their day allowing you to use the exact same power adapter on a 1992 PowerBook Duo 210 as you would on a 2000 Pismo G3. Screw you, HP.

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