You can look on Apple's support site where they have some bulletins covering battery usage and what constitutes a "cycle".
The one I had that failed cacked with less than 100 cycles in two years. They replaced it under AppleCare. Dan Sent from my iPod On Mar 23, 2011, at 6:49 AM, Allan Streib <str...@cs.indiana.edu> wrote: > Dan Penoff <lwb...@yahoo.com> writes: > >> It's cycles more than chronological time... >> >> Apple guarantees them for sometime like 300 cycles... > > What is a cycle? Is it a full discharge/full recharge, or any amount of > discharge followed by any amount of recharge? > > Allan > >> >> Dan >> >> Sent from my iPod >> >> On Mar 22, 2011, at 4:14 PM, Allan Streib <str...@cs.indiana.edu> wrote: >> >>> Already tried the power manager reset; the battery icon revereted to >>> "plugged in" for a few minutes, then returned to the "X" symbol. So I >>> think the battery is dead. >>> >>> I've ordered one from OWC. The current one is also an OWC battery; got >>> it at least 3 years ago, probably closer to 4, so I guess that's a >>> pretty good lifespan. >>> >>> Allan >>> >>> Dan Penoff <lwb...@yahoo.com> writes: >>> >>>> I had one on my MacBook Pro that cacked with no warning. Not realizing the >>>> battery had failed, it got unplugged while sleeping and as a result it >>>> goobered up my hard drive and I had to do a complete restore. >>>> >>>> Hence my warming about replacing it immediately. >>>> >>>> All of Peter's suggestions are certainly worth a try-nothing to lose there. >>>> >>>> MacDan >>>> >>>> Sent from my iPod >>>> >>>> On Mar 21, 2011, at 10:56 PM, Peter Frederick <psf...@earthlink.net> wrote: >>>> >>>>> Very likely. You could try a power manager reset with the battery >>>>> installed, though. How depends on the PB -- a Titanium has a pushbutton >>>>> under the keyboard up by the power button. Unplug the AC and lift the >>>>> keyboard, press the button, re-install the keyboard, and plug it back in. >>>>> When you start it up the clock will be wrong and if you are lucky, the >>>>> battery will charge. On an aluminum PB, with it plugged in, hold the >>>>> power button down for at least 5 seconds, Should beep and spin the fans >>>>> up. Release power key and press again to re-start, should work like the >>>>> TIBook. >>>>> >>>>> If that doesn't do anything for you, get a new one -- it's possible to >>>>> re-cell one, but you don't save any money, as I've discovered. >>>>> >>>>> Li-ion batteries acquire increasing internal resistance as they age, >>>>> resulting in a voltage drop when the current draw goes up, and eventually >>>>> you just can't get anything out of them. >>>>> >>>>> Have a care as the damned things are STILL fully charged and will catch >>>>> fire if shorted, even if the computer won't recognize them. >>>>> >>>>> Peter >>>>> >>>>> _______________________________________ >>>>> http://www.okiebenz.com >>>>> For new and used parts go to www.okiebenz.com >>>>> To search list archives http://www.okiebenz.com/archive/ >>>>> >>>>> To Unsubscribe or change delivery options go to: >>>>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>>> >>>> _______________________________________ >>>> http://www.okiebenz.com >>>> For new and used parts go to www.okiebenz.com >>>> To search list archives http://www.okiebenz.com/archive/ >>>> >>>> To Unsubscribe or change delivery options go to: >>>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>>> >>> >>> -- >>> 1983 300D >>> >>> _______________________________________ >>> http://www.okiebenz.com >>> For new and used parts go to www.okiebenz.com >>> To search list archives http://www.okiebenz.com/archive/ >>> >>> To Unsubscribe or change delivery options go to: >>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> >> _______________________________________ >> http://www.okiebenz.com >> For new and used parts go to www.okiebenz.com >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> > > -- > 1983 300D > > _______________________________________ > http://www.okiebenz.com > For new and used parts go to www.okiebenz.com > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
