OK, before any of you are a bit trigger happy with the reply button, let me 
preface this message by saying that I understand battery life is not something 
that is easy to calculate. Each minute your MacBook can be doing different 
things and the power draw from the battery is not consistent.

Having said that, I am somewhat convinced the battery life for my MacBook using 
Lion is now somewhat less than when I had Snow Leopard. I cannot prove it of 
course with easily reproduced steps. But at the moment, as I am writing this 
email, my battery status says 20-percent, an hour and 18 minutes remaining.
If we calculate this up to 100-percent, we know this battery will last 390 
minutes.
I of course don't know what the battery life would calculate to be if 
everything is the same, and I am writing this email under SL instead of Lion.
But what I do know is that under SL, my battery can give me 10 plus hours of 
nonstop usage.
This is doing anything but running Safari. I have  mid-2010 MacBook Pro.
Again, I am not saying the battery life is definitely less, but it certainly 
feels that way. Especially when my laptop seems to run a little more warm than 
it has been in the past.

I am not seeking any answers. I just want to bring this to your attention so 
you can be aware of your MacBook's battery life under Lion.
I imagine this has a lot to do with what some people are saying about the 
Spotlight. Lion probably has a new way of indexing the files in your system and 
is caching it more actively than SL. I am not in panic mode yet. I am quite 
sure Apple will come out with an update to improve the battery life.
For the meantime, I cannot expect the 10-hours of battery life I had before 
running SL.



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