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Time for a battery change?

 
Bartender
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Yesterday I noticed a slight bulge at the bottom of my 39 month old 13" Mac Book White. Coconut battery tells me I got 4216/5450 capacity, battery load cycles 581.
Besides the bulge, I do not see any other problems, visually as well as in performance.
Is it time for a battery change?
 
Sheriff
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Yup, if the battery bulges, it's gone bad. This has only happened to me once.
 
Maneesh Godbole
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Thanks Bear. Now to hunt for an iStore near me.
Is there anything like extended battery for Macs? If I remember Dell offers one. Normal battery lasts x hours, where as extended lasts x+ hours.
 
Bear Bibeault
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Call me cynical, but why aren't all Dell batteries "extended". Sounds like a racket to me... "Oh, you wanted one that works? That's extra!"

 
Bear Bibeault
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P.S. My battery was out of warranty by the time it boofed up, but I recall that they took off a lot on the replacement so it didn't cost a whole lot. I'm lucky to have two Apple stores in town.
 
author and iconoclast
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I got a free replacement when my battery did that under warranty.
 
Marshal
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You battery is less than 80% capacity; at that point it is worth getting a replacement, even if it doesn’t bulge. Though I am still using a Dell battery down to 59% capacity.
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