[X4U] Laptop battery life?

[Art]

On Nov 19, 2007, at 11:55 AM, Tom Renaud wrote:
> It only shows a full cycle after being discharged 100% and  
> recharged.  If you only use it down 25% and then charge, it's only  
> 25% of a cycle, so it takes 4 to make a fully cycle.
>
> Here are the stats on my MacBook Pro, I've had it for about 13  
> months, I leave it plugged in most of the time, and the battery  
> still has good life to it.
>
>  Battery Installed:       Yes
>   First low level warning:   No
>   Full Charge Capacity (mAh):   5188
>   Remaining Capacity (mAh):    5059
>   Amperage (mA):     -23
>   Voltage (mV):     12370
>   Cycle Count:     45

Mine -- a replacement about six months old now, used frequently w/o  
the charger then plugged back in -- shows this (seems strange, no?):

  Battery Installed:       Yes
   First low level warning:   No
   Full Charge Capacity (mAh):   4446
   Remaining Capacity (mAh):    4446
   Amperage (mA):     0
   Voltage (mV):     12404
   Cycle Count:     0

(Note: I have, in fact, received several low level warnings.)

Art

17" PowerBook: 1 GHz PowerPC G4
1 GB DDR SDRAM w. 160 GB Hitachi HD
Mac OS X 10.4.10 (Tiger) & OS 9.2.2 (Classic)