What's the average life (cycles) of a SR MBP?

I currently have 18 cycles. I know it's early, I only had it for 3 weeks now, but I would really like to know what's the average cycle life of a battery of this sort. I have the MBP in my sig..

Thanks...

 

the batt is designed to hold 80 percent life with 300 full discharge cycles. Notice how I said full discharge. For example, the deeper u discharge ur battery each time, the shorter it will last. Say u only go til 50 percent each time, ur cycle life will exponentially increase. If u let it discharge all the way, U'll be replacing ur battery after around 350 cycles. If u treat it right (as in, discharge it less), u can pull off as many as 800 cycles (I did with my thinkpad) normal usage usally yields 2.5 years

 

Spookoman has it right. I'm not going to bother to repeat it again .

To conserve your battery life you should take out your battery whenever you don't need it. For example, if you know you're going to be home all week and you 'll be using the power cord for power, take out the battery and store it somewhere cool. If you know you won't be using the battery for a long time (1 week or so) run it down to about 40% charge and then take it out.

 

so wait. can i take out the battery and just plug in the ac adapter and use it just fine? never knew that..,

 

Yes, it is perfectly fine to run your notebook from the AC adapter and battery taken out. In fact, your battery not in use if you have to the power adapter connected (that is, unless its charging). So take out your battery when you don't need it.

The only concern with taking out your battery is that you may accidentally disconnect the power cord and the MacBook will shut off. However, not always is the file lost; once I tripped over my power cord (thank goodness its magnetic ) and my battery was out; I immediately re-connected as soon as I could (I think about 3 seconds after it was disconnected) and the MacBook just recovered from its Sleep state.

Also, if you have a power outage and your battery is out your MacBook will also shut off. But if you're fine with these "possible problems", then take out your battery when you can. It helps preserve the battery life.

 

well now i got you guys sayin that its ok to take the battery out? i read somewhere that macbooks are smart enough not to overcharge the battery and that leaving it plugged in all the time with the battery still in there wont harm the battery. i also read that if the laptop is running just off of the AC cord the proccessors will only operate at 1.0 instead of 2.0. was i miss-informed?

 

MacBooks are smart enough not to overcharge the battery. But like all notebooks, batteries left inside are subject to heat from the notebook. Heat doesn't do the battery any good (but the damage is very minimal), so taking out the battery is best.

Leaving the battery in the MacBook will not damage the battery noticeably, but if you keep good practices (taking out the battery whenever you don't need it, storing the battery in a cold environment) for years you may be able to get more charge cycles than someone who used the battery like an average user. So the average user's battery may die in two years but your's might last 3 because you conserved it the best you could.

As for your last question, the processors not operating as fast when battery is out, I'm not too sure if that's true or false. But considering the battery isn't active when you have the power cord connected, I see no reason why the processor would run slower. Even leaving the battery inside its still the same electricity running through the cord...why would taking a battery out lower the amount of electricity running through? Again, these are my thoughts, not facts. I can't confirm if that's true or false.

 

You've got it backwards. The CPU underclocks under battery power in nearly every notebook I've ever seen.