Macbook Cannot Sustain Charge; Crashes at 84%

diametric

macrumors regular
Original poster
Jul 4, 2006
115
0
Sydney
For a few weeks/maybe a month or two, my Macbook cannot hold a charge.
iStat Pro says the battery health is 74%, Ive had it for a bit over a year.
And, earlier today, my Macbook crashed half an hour into watching a video whilst being powered by the battery which was at 84%.
So.
Im thinking, it MUST be something else.
Power up, less than a minute in, it crashes again, and again.

Do I call Apple?
Do I buy a new battery? And I should not have to do that.
There's obviously something wrong.

If someone could give me some advice, especially if theyve been involved in a similar situation, it would be greatly appreciated.

Thanks.
 

kolax

macrumors G3
Mar 20, 2007
9,186
115
How often did you calibrate your battery? (i.e. leaving it switched on while running off the battery until the battery completely runs out)