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dr_frost_dk is offline dr_frost_dk
2010-12-17 , 09:59
Posts: 1,503 | Thanked: 2,688 times | Joined on Oct 2010 @ Denmark
#11
Originally Posted by ktchiu View Post
I'm doubtful that we'll see such a huge leap in battery life in future devices. The more power available means beefier and more power-hungry components. Besides, I feel like I've seen news like this for the past few years but havent seen any major changes.
take it from one of those free energy nerds (me... hehe), there is a lot of things in the works, not only battery's but also new supercapacitors that finally has REAL capacity, and if you have an external power plug like me, just able to take 10A+ you can charge the phone in under 10minuts from empty and full
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Wikiwide is offline Wikiwide
2010-12-17 , 10:13
Posts: 1,994 | Thanked: 3,342 times | Joined on Jun 2010 @ N900: Battery low. N950: torx 4 re-used once and fine; SIM port torn apart
#12
Originally Posted by gerdich View Post
On laptops you can do that with hibernate:

You go into hibernate.
You exchange the battery.
You continue working where you stopped!
I don't know much about Linux, but on Windows Hibernate is really bad.

First, you hibernate each night, because you don't want to close and reopen the programs each time. Very well.

Second, after week or so you get strange problems: context menu not opening, Notepad without "File Edit ..." menu, Paint failing to create an empty document, etc.

Third, in order to get memory/resources back, you need to restart either some of the programs, or the whole operating system.

Maybe, on Linux Hibernate is better. I hope so.
 
geneven is offline geneven
2010-12-17 , 10:15
Posts: 5,795 | Thanked: 3,151 times | Joined on Feb 2007 @ Agoura Hills Calif
#13
Originally Posted by gerdich View Post
On laptops you can do that with hibernate:

You go into hibernate.
You exchange the battery.
You continue working where you stopped!
Yes, but doesn't that involve saving the state of everything to the hard drive, which is time-consuming?

I just want something to keep me from having to reboot while swapping batteries.

It seems like such a simple concept -- why doesn't hardware to do this with the N900 already exist?

It's basically like in-air refueling.
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ndi is offline ndi
2010-12-17 , 11:42
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#14
Originally Posted by geneven View Post
I just want something to keep me from having to reboot while swapping batteries.

It seems like such a simple concept -- why doesn't hardware to do this with the N900 already exist?

It's basically like in-air refueling.
It does, N900 can swap batteries without rebooting if you are near a wall charger or have an external emergency pack.

As for hibernate issues, they all have it. The hibernation saves as much as possible from the state of PC, like RAM, state of CPU, registers, etc. However, not everything is saved, for example internal state of hardware. On resume, the GPU might be in a mode that sucks, cards might be in a "clean" state, etc. Any driver, card, etc not working perfectly on hib will destabilize OS operation sooner or later.

For me, it's the audio card that goes odd on resume. Need to reset it every resume.

Saying that one OS or another is better is hearsay and special case scenarios. Truth is, hibernation is not feasable unless all is known. Like in a good laptop.

There are cool things afoot, like Asrock's Instant on. What it does on poweroff is reboot to a clean OS and then go in deep STR, so on button press it has a 1 sec powerup. Fails for power loss, though.
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geneven is offline geneven
2010-12-17 , 12:16
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#15
Originally Posted by ndi View Post
It does, N900 can swap batteries without rebooting if you are near a wall charger or have an external emergency pack.

Pursuant to your claim, I just plugged my N900 into a wall outlet with a USB cable. My N900 displayed the message "charging".

I took out the battery and replaced it with another one. While I was doing so, my N900 rebooted.

I suspected that it might work with an emergency pack. I'll try it.
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zimon is offline zimon
2010-12-17 , 12:33
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#16
Originally Posted by geneven View Post
I took out the battery and replaced it with another one. While I was doing so, my N900 rebooted.
There is a thread here somewhere where is instructions how to do it. MohammadAG or some of those hardcore hackers did it. It was not very convenient way because you have to have external power through microUSB additionally with you as well as the extra battery to do this on a road. Some services has to be halted and BME tricked to this 20s lasting special mode and so on.

Overall I am not sure we want more capacity into batteries, if it will mean more radiation sent from our mobiles. I already use 2400 mAh daily on N900 and I do not know how much of it is absorbed by my body via radiation and what will the long term effects be.
Last edited by zimon; 2010-12-17 at 12:36.
 

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shadowjk is offline shadowjk
2010-12-17 , 14:38
Posts: 1,258 | Thanked: 672 times | Joined on Mar 2009
#17
I don't think we'll get more battery life. Manufacturers will use the extra energy density, when it becomes available, to make smaller devices, and the average dumbphone is back to 1 week life and smartphone back to 1 day life.

It has happened with laptops, and it has happened with phones before. Whenever a new generation of chips that use dramatically less power, or a new generation of higher capacity batteries become available, you get at most one model with decent batterylife, after that they realize they can save costs by making the battery smaller, and can make the device smaller by having a smaller battery. People think the new small model is "cute" or "sleek", and soon everyone thinks the old one is "huge" and "clunky", and (implicitly) demand manufacturers to cripple the batteries to get smaller devices
 

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retsaw is offline retsaw
2010-12-17 , 15:43
Posts: 701 | Thanked: 585 times | Joined on Sep 2010 @ London, England
#18
Originally Posted by zimon View Post
There is a thread here somewhere where is instructions how to do it. MohammadAG or some of those hardcore hackers did it. It was not very convenient way because you have to have external power through microUSB additionally with you as well as the extra battery to do this on a road. Some services has to be halted and BME tricked to this 20s lasting special mode and so on.
All you really need to do it plug in the charger and after it starts charging stop bme (that's simply "stop bme" in a terminal as root), once you have stopped bme you have 32 seconds to change the battery before the N900 goes into autonomous charging mode (because bme isn't running), and once you're done restart bme ("start bme" in a terminal as root). The main caveat is that you need to make sure your N900 won't want to use more power than the charger will provide, so it is probably best to turn off GPS and 3G networking (maybe more if you are using a low power charger) before doing this.

Now if only I had a mini charger, say the size of a mini bluetooth dongle, that could provide a few minutes of power just to do this hotswap. One of those emergency chargers might do, but they're a bit bulkier than I'd like and I don't know how much current they put out.
 

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stlpaul is offline stlpaul
2010-12-17 , 16:00
Posts: 1,141 | Thanked: 781 times | Joined on Dec 2009 @ Magical Unicorn Land
#19
Originally Posted by pisthpeeps View Post
I have always maintained and will maintain that unless they add powdered viagra as one of the ingredients, batteries would not last longer.
If your N900 battery life lasts longer than 4 hours, please contact your physician at once...
 

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kureyon is offline kureyon
2010-12-17 , 16:45
Posts: 992 | Thanked: 738 times | Joined on Jun 2010 @ Low Earth Orbit
#20
Originally Posted by zimon View Post
Overall I am not sure we want more capacity into batteries, if it will mean more radiation sent from our mobiles.
Please explain how a bigger capacity battery affects the radiation put out by the phone?
 

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