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10-22-2008, 03:16 PM | #16 | |
Developer
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Quote:
Basically, the iLiad's power-saving feature is that it turns down the CPU speed to "low" most of the time, and only turns it up when there's work to do. So it conserves power all the time, no matter what program you're running. This technique adds about 10% power savings. As far as I know, some of the hardware (ethernet, card readers) is only powered when it's needed, which also helps with power savings. I don't know about other power-saving stuff. Anyone else know more? |
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10-25-2008, 01:37 PM | #17 |
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I updated the software to version 0.11. The only change: I added a new utility, BatterySnapshot, which is useful for getting a quick look at what the battery is doing and can be run from the ContentLister using the included script.
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10-26-2008, 02:26 AM | #18 |
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Congratulations, Glad to see someone else do this mod and happy that the larger batteries worked for you! I really appreciate the software. I will try to download it and see if it makes any difference for me. Thanks again.
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10-26-2008, 02:37 AM | #19 | |
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Bear in mind that the software is currently hard-wired to assume your batteries are 2800 mAh each. If they are less than that, it won't work properly and your iLiad will drain the batteries too low. After iRex releases the source code next week for powerMgr and the battery.o kernel module, I'll be writing altered versions that should work automatically with any battery size. I'll post them here when I get them working! |
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10-27-2008, 12:43 PM | #20 |
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I just heard from someone who tried this mod and had a short-circuit when putting the case back together. So I have added a big WARNING to the beginning of the guide, as well as an extra item in the "switching batteries" section that specifically promotes using electrical tape to prevent short-circuits.
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10-27-2008, 01:13 PM | #21 |
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Yes, I would recommend anyone approach this with caution. I originally upgraded to the 1800mah cells without a problem. After reading about the 2800 mah I decided to go that route and now it appears the power board is having a problem. To be fair, I was seeing odd charging behavior starting a few days prior to my latest upgrade so it could be coincidental, but everyone should be cautious. My background is in electrical engineering so I knew what I was doing, but issues can always pop up. Be careful. Now I just need to beg iRex to sell me a power board!
P.S. Kudos to jharker for offering assistance with software code to help in the troubleshooting process. Thanks again. |
10-28-2008, 10:40 AM | #22 |
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Great post & mod!
As european user of Iliad I have a question: is out there any other battery seller? Batteryspace seems to be devoted to american market; moreover, on Calviny's post there are some complaints about the service to Europe. |
10-28-2008, 01:19 PM | #23 |
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I think the complaints were more related to the strict controls they had in place for overseas selling. I believe the gentlemen finally got everything resolved. I would recommend just calling them as opposed to placing the order online. I've found their service to be absolutely top notch and very responsive.
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10-29-2008, 11:11 AM | #24 | |
fruminous edugeek
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Quote:
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10-29-2008, 12:06 PM | #25 | |
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Ok
Quote:
I understand their problems. That is why I asked for an european battery retailer . |
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10-29-2008, 12:38 PM | #26 | |
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If somebody knows what they are doing it's a relatively easy upgrade so I wouldn't shy away from it. I would say you need to be aware of two issues:
Hope that helps. |
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10-29-2008, 12:50 PM | #27 |
fruminous edugeek
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I was planning on getting my brother to do the upgrade for me over the holidays-- he has more practice with a soldering iron than I do, and steadier hands. I just wanted to see if there were unexpected consequences before I take the plunge.
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10-29-2008, 01:44 PM | #28 |
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So far I haven't had any problems at all with my board or batteries. Obviously I haven't had the mod for very long, but so far it's been pretty good.
Of course, recently I've been using my iLiad mostly for reading, 1-2 hours per day. With a 35-hour battery life, I haven't actually had to charge it for at least a week. So there hasn't been a lot of battery cycling going on. |
11-02-2008, 09:13 AM | #29 |
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Has anyone found any possible battery substitutions for either this one or the 1800mah mod? Trying to charge $75 international shipping for 2x50g batteries is just extortion.
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01-21-2009, 08:41 AM | #30 |
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I change the battery into 3000mA*2 successfully
but I don't know how to kill the powerMgr program and install your software I don't your iLiadPowerManagement-0.11.zip unziped it and copy into the sd card then I don't know how to install and you mention about kill the powermgr program, what't that mean help me please Last edited by tudou331100; 01-21-2009 at 08:46 AM. |
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