Hi I'm new here so I wouldn't really know where to post this. I'm currently using macbook pro (June 2009 alu body) running osx 10.6. Lately my macbook randomly switches off while using the battery even though it's full or at whatever percentage. It makes a click noise - which I assume it's the harddrive - and just switches off. Also, this does not happen with it's connected to a power source. Is it a battery issue? Harddrive issue or a software issue (I had a powerpref. problem earlier this year which was resolved) I'm asking whether there's a solution that I do myself rather than sending it to a service center as where I live it may take weeks and I can't really afford to do that. Thanks in advance.