Not to sound this way, but are your SURE its the AC Adaptor? Maybe I read the question funny, but if the adaptor is chirping, its dead. If the chirping is coming from the laptop find a friend with a cheap multimeter and test the AC adaptor. DO NOT buy a new adaptor until you test the old one if the laptop is chirping, unless you like to gamble and don't mind wasting money.

I don't know of any other ways to charge a laptop battery easily. Sure, you could make something, but its not worth it as adaptors are cheap..

However, if the ac adaptor is chirping, I like the TARGUS BRAND for a good solid Universal brand. Cheap. easy. and includes a bunch of extra tips for other computers. Make sure they have Sony Tips. I didn't have a tip for my Vaio and had to find a Vaio adaptor recently.. Kensington is also a nice Universal brand. Universal would be a nice purchase if you have more than one laptop...

As for buying an adapter off ebay, honestly, they are all the same thing.They are probably made in the same place as OEM adapters, but just generic. Nothing wrong with the generic, probably made in the same place. Most ac adapters are made in China, in a handful of factories. Voltage is voltage. MaH is MaH (milliamps) . Same thing. Your computer won't be able to tell the difference. Just make sure the tip is the same as well. Voltage, MaH and Tip must all match for it to work..

However, If you can find an OEM ac adapter (SONY branded) for $5-10 more, buy it. If not, its not worth the extra money just to feel good. Having an OEM adapter will also add to resale value though not much..
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