I've been using a Vaio Picturebook (C1XD) for the last few months.
A few days ago, while on charge, I heard a high-pitch noise coming from either the laptop or the battery.
After wiggling the power lead, it stopped.
Now the battery only lasts only 10 minutes from a full charge, instead of 1 hour as it did before the sqeaking.
It won't charge unless it's totally empty too.
I'm not sure if it's the psu or the battery that's the problem. Can li-ion batteries go bad as quickly as that?