Bench-testing the 9-cell and ultrabay slim batteries!

T4x series specific matters only
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kjarrett
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Bench-testing the 9-cell and ultrabay slim batteries!

#1 Post by kjarrett » Tue Nov 09, 2004 5:38 pm

Ok, so I got home early (4pm), booted up, sans-AC, and we're going to see how long I can work tonight before the machine powers off.

I'm running at full-brightness, full-everything, wifi, networking, you name it, it's on.

So far, I've burned 40% of my Whr's in 1hr 36 minutes! That's not so promising!

Stay tuned! Film at 11 (or sooner if the battery doesn't last, LOL)

-kj-
IBM Thinkpad T42p 2373-KXU | 2.0ghz Pentium® M 755 | 2gb RAM | 15" UXGA Flexview | FireGL T2 128mb | 60gb @ 7200rpm | CDRW/DVD Multiburner | IBM a/b/g

kjarrett
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#2 Post by kjarrett » Tue Nov 09, 2004 8:02 pm

Whoa! Not such good news!

My 99.96 Whr of juice lasted only 3h 45m !!! Now, mind you, I was HAMMERING on the thing just like I would on AC power, with constant HD accesses, WiFi cranking along, full screen brightness. It also hibernated with 10% juice left (I need to kick that down to 3-5%).

From this I conclude:

1) I need to throttle back on some settings if I want better battery life!
2) The Flexview SUCKS JUICE like there's NO TOMORROW!
3) Buying the Ultrabay Slim wasn't just a GOOD IDEA, it's practically a REQUIREMENT.

I'm not unhappy, just a bit suprised, thought I'd do better ... and again, am very happy I got that Ultrabay battery. Might need to snag another one on ebay, LOL!

-kj-
IBM Thinkpad T42p 2373-KXU | 2.0ghz Pentium® M 755 | 2gb RAM | 15" UXGA Flexview | FireGL T2 128mb | 60gb @ 7200rpm | CDRW/DVD Multiburner | IBM a/b/g

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#3 Post by eriqesque » Tue Nov 09, 2004 8:15 pm

Throttle the processor back and cut the brightness on your screen and I bet you could get about 7hrs maybe more
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#4 Post by lfeagan » Wed Nov 10, 2004 1:03 am

Yes, the Ultraview really kicks the snot out of your battery life. I was thrilled to get my 14.1" display. The edu sales rep I talked was like why don't you get the 15" since you do graphics/bioinformatics stuff and I was like "NO", that thing makes for a heavy as hell notebook and kills battery life. Anyone looking for good batt life should not get a 15" or a flexview.
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#5 Post by plucky duck » Wed Nov 10, 2004 1:12 am

I have the 9-cell extended as well and it has been and still is serving me very well.

Even after I watch a movie in throttled down mode I still have about 45% battery life left.

Surfing the net in general lasts forever, about 6hrs. This is with screen brightness set to two notches above the lowest setting.
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kjarrett
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#6 Post by kjarrett » Wed Nov 10, 2004 5:22 am

Thanks guys. Agree with all comments thus far. So if I want to play with settings to extend battery life, what are the biggest power hogs, in order from most to least? (i.e. things I can change)

- Screen brightness
- CPU (how is that controlled? I thought it was automatic)

???

TIA,

-kj-
IBM Thinkpad T42p 2373-KXU | 2.0ghz Pentium® M 755 | 2gb RAM | 15" UXGA Flexview | FireGL T2 128mb | 60gb @ 7200rpm | CDRW/DVD Multiburner | IBM a/b/g

Skywing
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#7 Post by Skywing » Wed Nov 10, 2004 8:36 am

1. Download SpeedswitchXP
2. Enjoy
3. .......
4. Profit
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#8 Post by awolfe63 » Thu Nov 11, 2004 6:05 pm

kjarrett wrote:Whoa! Not such good news!

My 99.96 Whr of juice lasted only 3h 45m !!! Now, mind you, I was HAMMERING on the thing just like I would on AC power, with constant HD accesses, WiFi cranking along, full screen brightness. It also hibernated with 10% juice left (I need to kick that down to 3-5%).

From this I conclude:

1) I need to throttle back on some settings if I want better battery life!
2) The Flexview SUCKS JUICE like there's NO TOMORROW!
3) Buying the Ultrabay Slim wasn't just a GOOD IDEA, it's practically a REQUIREMENT.

I'm not unhappy, just a bit suprised, thought I'd do better ... and again, am very happy I got that Ultrabay battery. Might need to snag another one on ebay, LOL!

-kj-
You have 99WH!

Mine have only 4 cycles and I only have 88WH total. However - at medium brightness reading documents in Acrobat & Word - I can cruise at 9-10W and get 8-9 hours from the 2 batteries.
Andrew Wolfe

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