Hi chrissie_dee,
welcome to Questions & Answers..
You should be able to purchase a replacement battery from Vaio support or possibly from one of Sony's authorised repair partners, to find the contact number for Vaio support.
Open Vaio support, either by clicking Support at the top of this page or use the following link:Vaio support
Under Log-in option 1: Enter your vaio models serial number, which you should find on the bottom of your Vaio.
Then click Log-In
Once logged select Get In Touch
Then Click on the Out of Warranty tab, then Phone support.
To locate the nearest Sony service partner click on Out of Warranty Service tab
You may find cheaper prices for a replacement battery via Google but be aware than some retailers sell non Sony compatible batteries with the same battery model number..
