OESF Portables Forum
General Forums => General Discussion => Topic started by: andrewmaier on November 14, 2005, 05:22:28 am
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So I have a Sl-760 and a Pretec wlan card (Cacko rom). The wlan works fine (even for my WPA enabled setup at home), but the time I get out of being online appears to be very short. At max I can get something like 30 min without the battery running out. Is there any way to improve this?
Do the wlan drivers support any energy saving mode. If so how is this enabled? Bandwidth is not normally the problem. I mainly want to read my mail and surf the web, which is sufficiently fast in most cases. But the battery life is so short being online, I hardly do it without having my power adapter with me, which is a bit odd
So what do you do to improve the battery life while being online? Do you have similar experiences?
Any clues welcome,
Andrew
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Most likely your battery is almost dead and you need a new replacement one. Get one at amazon for $25 while they are available...
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Most likely your battery is almost dead and you need a new replacement one. Get one at amazon for $25 while they are available...
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Unfortunately, Amazon will not ship electronics (and batteries) to Europe. Is there any kind soul that would be willing to buy a few (I am sure there would be more non-US residents interrested) and then ship them?
Still I would like to know. How much online time do you get out of a full battery?
Thanks,
Andrew
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Still I would like to know. How much online time do you get out of a full battery?
2.5 hours on C1000 using EA-BL08 battery with WiFi online, full brightness and CPU overclocked to 620 Mhz.
3.5 hours with EA-BL11 battery undre the same conditions.
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or use a bluetooth CF card and PAN networking, it saves quite a bit of power... you only get 300kbps, but if you're relying on say a DSL line, you're not going to notice much difference (I don't and I'm on a 512kbps ADSL line).
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I just changed from sharp rom to openzaurus and now I can set some power options with iwconfig - nice!
I've been trying
"iwconfig wlan0 power period 1000m"
helps a lot when working on the zaurus, but of course isnt so good when ssh'ing in so I do an "iwconfig power off" when at my desk and the zaurus is connected to power.
Try setting txpower as well maybe? (my card wont do it)
root% cardctl ident
Socket 0:
product info: "WLAN", "11Mbps_PC-Card_3.0", "ISL37100P", "Eval-RevA"
manfid: 0x000b, 0x7100
function: 6 (network)
cheers,
hpgl2
5500, 1Gsd, orinoco
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2.5 hours on C1000 using EA-BL08 battery with WiFi online, full brightness and CPU overclocked to 620 Mhz.
3.5 hours with EA-BL11 battery undre the same conditions.
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Jesus christ, what card do you use? I barely get 2 hours with the extended battery on my 860.
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The brightness level you set makes a big difference. I set mine to what can best be described as "dim" when on battery power. I also use a socket wi-fi card which gets more life than, for example, an ambicom card I have.
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The brightness level you set makes a big difference. I set mine to what can best be described as "dim" when on battery power. I also use a socket wi-fi card which gets more life than, for example, an ambicom card I have.
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That's quite interesting, about the screen brightness, I didn't know it mattered so much.
I have both a Zonet ZCF1100 and a Socket/Symbol card (Spectrum24 chipset), and tho' it might be superior in power consumption it doesn't appear to support WPA, and its receiver is a lot less sensitive than the ZCF (prism2/3).
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Still I would like to know. How much online time do you get out of a full battery?
2.5 hours on C1000 using EA-BL08 battery with WiFi online, full brightness and CPU overclocked to 620 Mhz.
3.5 hours with EA-BL11 battery undre the same conditions.
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- EA-BL11 is what my C1k came with. I don't think I get 3.5 hrs from it, but quite frankly I've never tested it from a full charge to red. I'd guess 2.5 hrs, no overclocking, display next-to-dim 'cause Cacko has issues with full dim. (shrug)
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As an example of just how much current a backlight draws, on an Ipaq you can interogate the battery ASIC. Below are two consecutive ASIC readouts, one with backlight, one without.
You can see how the "Active current" changes between light on and light off and the battery really does last 10 times as long wihtout the backlight.
Battery Monitor
Voltage : 3740 mV
Active current : -20 mA
Accumulated current : 1320 mAh
Temperature : 25.375 deg C
Local calculations
Local TAD : 264180
Last ACR update value : 5284
Is learning? : no
DS2760 updates : 138
Full level : 1321 mAh
Derated full level : 1321 mAh
Empty level : 18 mAh
Percentage : 99
Lifetime : 3906 min
Option jacket
chemistry : 0x05
percentage : 0x64 (100)
flag : 0x11
************************************
root@h3600:/# b
Battery Monitor
Voltage : 3583 mV
Active current : -295 mA
Accumulated current : 1319 mAh
Temperature : 25.625 deg C
Local calculations
Local TAD : 264180
Last ACR update value : 5284
Is learning? : no
DS2760 updates : 142
Full level : 1321 mAh
Derated full level : 1321 mAh
Empty level : 18 mAh
Percentage : 99
Lifetime : 264 min
Option jacket
chemistry : 0x05
percentage : 0x64 (100)
flag : 0x11
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Is there any way to active power management function on Sharp ROM? I want to use "iwconfig power" command but system shows "not implement this function"....
Without this function , the wifi card drained battery pretty quickly. I guess I only got 2 hours also.