make script twice as efficient :)

[samwyse]

date >> ~/batlog.dat
/usr/sbin/ioreg -l | egrep 'CycleCount|Capacity' >> ~/batlog.dat

[jakl]

Make sure to use -rk BatterySerialNumber

time ioreg -l > /dev/null

real 0m1.415s
user 0m0.155s
sys 0m1.258s

time ioreg -rk BatterySerialNumber > /dev/null

real 0m0.013s
user 0m0.003s
sys 0m0.010s

[va3paw]

Now with the temperature data collection

date >> ~/batlog.dat
/usr/sbin/ioreg -l | egrep 'Capacity|Temperature' >> ~/batlog.dat

[pronoiac]

You dropped CycleCount, va3paw. I added that and some charging info:
(date; /usr/sbin/ioreg -l | egrep "CycleCount|Capacity|Temperature|Charg" ) >> ~/batlog.dat

Caveat: I haven't checked whatever parses the logs into csv.
Incidentally, specifying the full filepath might be a good idea. Maybe we should have a helper script for that, I don't know.