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spalding12 · Sep 28, 2003, 08:05 PM

if battery is at 100% and then unplugged and immediately to sleep...
how long should the battery last?

thanks

greg

vancenase · Sep 28, 2003, 08:17 PM

a while ...

maybe someone can experiment?

but who resist using their PB for that long?!?

anti-sleep · Sep 28, 2003, 09:00 PM

Somewhere I heard that it uses approx. 1% per hour while in sleep. So my guess would be around 100 hours, but that was just a number I read somewhere.

MaxPower2k3 · Sep 28, 2003, 09:35 PM

my 12" (rev. A) uses about 1% per hour while in sleep, so, yeah, 100 hours (or a few hours shy of 4 days) is probably a good estimate. And, in any case, if you don't plan on using it for more than a day or two, it's probably better to just turn it off anyway.

spalding12 · Sep 30, 2003, 05:16 AM

for the record
with MY Rev. B powerbook 17"
16 hours of sleep brought only a 6% decrease in battery life

11:30pm - 78%
3:30pm (the next day... 18 hours later) - 72%

......... interesting
AIRPORT "ON" the whole time (not sure if that makes a difference)

greg

michael_on_mac · Sep 30, 2003, 06:24 AM

Originally posted by spalding12:

......... interesting
AIRPORT "ON" the whole time (not sure if that makes a difference)

greg

Shouldn't. At least as long as there's no "wake-on-WLAN" (wowl...)

What's your RAM config?

Best,
Michael

spalding12 · Sep 30, 2003, 06:51 AM

only 512...
need more... apple has none yet at the local stores
i should just buy some aftermarket stuff
only have had it since saturday
even with only 512K i was suprised as to the lower power consumption while sleeping

greg

nagromme · Sep 30, 2003, 10:55 AM

That raises a good point--how much will sleep life diminish from, say, tripling the RAM to 1.5 GB as I would likely do? Would sleep life be cut down to 1/3?

spalding12 · Sep 30, 2003, 11:08 AM

i can't believe that sleep life would be cut down that much by doubling or tripling the stock RAM. i might be wrong, of course...
but having more RAM having that much of an influence.... seems unlikely to my mind.

greg

amazing · Sep 30, 2003, 11:56 AM

I can't imagine that power consumption during sleep has anything whatsoever to do with RAM--that's all asleep, after all. Jaguar does use more power during sleep than OS 9 did, that's how it wakes up faster. Those componenets that are active during sleep will have a set power consumption, regardless of RAM.

Unfortunately, the menubar battery guage is notoriously inaccurate, you definitely can't use that very reliably. I'm wondering if the freeware utility X-Charge gives a more accurate picture for what happens during sleep? I'll have to try it sometime...

nagromme · Sep 30, 2003, 10:22 PM

I thought the RAM was the one thing that WAS still getting power. That's what makes sleep different from powered-off: your memory contents are preserved. (And not by writing .5 to 2 GB to HD and reading it back in a split second. Save-and-sleep would be nice as an option though.)

Sleep does use power. What else would need to be powered, besides the RAM?