1 Battery life less than expected
Hi, I have got the battery replacement for my Macbook Pro 13" mid 2009 model. The self replacement guide on the website is great and so easy to follow. However, I first have 102% of the designed battery capacity, and after the FIRST caliberation following the instruction on apple website, the actually capacity got down to 94% only, and keep the same up to my 5th caliberation by now. What could be the way to make the capacity back to its near 100% condition? Thank you very much!
Best,
Ronald
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Ronald,
I think laptops measure charge percentage by measuring battery voltage. Laptops use Lithium-Ion type batteries (or some slight chemical variation). These batteries extremely sensitive and if it was somehow damaged (or manufacturing defect) it will not go to it's full voltage, thus showing a reduced voltage.
What's your typical run time and what is your computer doing? Anything that might suggest the battery is no good?
- de Phillip Takahashi
My MBP is exactly 2 years old and most of the time I attached the laptop to the power on my table. The first time I use the new battery, the power adapter comes pretty hot, and then after the first caliberation, it turns back to fine temp, but the battery shows only up to 94%. My usual operation is for word processing and online browsing, never use for gaming. No really complaining about the battery is no good but I would like to learn the way to make the battery back to its full capacity (after all, this is only the 5th day since I got it).
- de leeicep