My battery icon in an X
So for a while my battery has been saying 'Service Battery' when you click on it and has slowly started holding less and less charge and taking more time to start up but now the battery icon is just an 'X' symbol, no percentige given and says 'No Battery Available' when clicked on. I've been meaning to replace it for a while but I've been told that because batteries are classed as consumables they're not covered by Apple Care (which has ran out now anyway) and I'd have to pay the £100+ for a new one to replace it (not even sure if they can do this in the Genius bar or not, anyone know?). My computer turned on by itself (no power supply) I noticed it and connected a power supply and that's lit up which from what I've read of other people similar problems their charging light didn't come on.
Can anyone help me with it, how to get the battery percentage back until I can atleast replace it?, why would it have randomly gone like this when about 7 hours ago it was 'fine', showing the charged battery like normal?, now it's showing this will it somehow be harmful to my computer in anyway like the battery isn't leaking or anything is it?
Thanks 🙂
MacBook Air, Mac OS X (10.7.5)