Re: Notebook Battery
M-L wrote: On Tuesday 17 July 2007 19:19, koffiejunkie shared this with us all: --} Is there anything I can do to improve this, or this battery just on the --} way out? I'm just bothered by the suddeness of this drop in battery --} life - it's been at about an hour for a good six months now, and stayed --} pretty stable. Unless some of the cells just died. --} --} Thanks [...] I have always found that to get the most out of the life of a laptop battery, you have to run it right out, something that, I think, the latest windows won't allow, till it just drops right out. This way there is no memory built up, but when the battery finally does (*) really die. It's dead for ever. As well you have to have a good filesystem like ext3 on the lappy, that will recover from this kind of crash, and of course, manually save everything for the last 3 minutes or so of battery life, and just play a game or something till it crashes, with everything else shut down. The battery will then last for years, or does in my case. I have to use laptops because we have solar power, and have to husband our power and use it frugally. This applies only to NiMH or NiCd batteries which were used in older notebooks, as far as I know. A good reference is Batteries in a Portable World. A handbook on rechargeable batteries for non-engineers http://www.buchmann.ca/ -- Regards, Jörg-Volker. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: Notebook Battery
Stefan Monnier wrote: Given the specs of your battery (10.8V 4.8Ah, i.e. 51Wh), an autonomy of one hour means your laptop consumes around 50W, which is a hell of a lot for a laptop, unless you keep it constantly in stress test (with full CPU and disk, and graphics card load). So I'd guess that your battery's original lifetime is a good bit longer (at least 2h), and that when it lasted an hour, it was already on its death bed. You are spot on. The original life was about 3:30 in normal use, but the motherboard died and since I got it back from HP (actually, it was the HP certified partner who fixed it), it's been about an hour. In hindsight they probably swopped out the battery, since the notebook was only two months old at the time. Anyway, after sending the original mail I tried running it down a few times (used memtest86 so there's no OS involved) and recharging it, and each time the recharge and discharge times were shorter. After three times it died completely. Get a new one, or try refilling this one. New one on order... Thanks -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: Notebook Battery
Jörg-Volker Peetz wrote: Batteries in a Portable World. A handbook on rechargeable batteries for non-engineers http://www.buchmann.ca/ Great link, thanks! -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Notebook Battery
Hi guys, I know the answer to this will probably hurt, but I thought I'd give it a shot in any case. My notebook's battery life took a sudden drop from around an hour to about 15 minutes. I is a 4800mAh battery. Fully charged, I noticed this: theluggage:/proc/acpi/battery/C17C# cat info state present: yes design capacity: 329 mAh last full capacity: 329 mAh battery technology: rechargeable design voltage: 11100 mV design capacity warning: 17 mAh design capacity low: 4 mAh capacity granularity 1: 100 mAh capacity granularity 2: 100 mAh model number:Primary serial number: 02034 2005/10/14 battery type:LIon OEM info:Hewlett-Packard present: yes capacity state: ok charging state: charging present rate:1620 mA remaining capacity: 329 mAh - present voltage: 12463 mV theluggage:/proc/acpi/battery/C17C# Is there anything I can do to improve this, or this battery just on the way out? I'm just bothered by the suddeness of this drop in battery life - it's been at about an hour for a good six months now, and stayed pretty stable. Unless some of the cells just died. Thanks -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: Notebook Battery
I know the answer to this will probably hurt, but I thought I'd give it a shot in any case. My notebook's battery life took a sudden drop from around an hour to about 15 minutes. I is a 4800mAh battery. Given the specs of your battery (10.8V 4.8Ah, i.e. 51Wh), an autonomy of one hour means your laptop consumes around 50W, which is a hell of a lot for a laptop, unless you keep it constantly in stress test (with full CPU and disk, and graphics card load). So I'd guess that your battery's original lifetime is a good bit longer (at least 2h), and that when it lasted an hour, it was already on its death bed. design capacity: 329 mAh So even the design capacity has been changed, which looks rather odd. Is there anything I can do to improve this, or this battery just on the way out? I think it's been dead for a while now. I'm just bothered by the suddeness of this drop in battery life - it's been at about an hour for a good six months now, and stayed pretty stable. Unless some of the cells just died. Get a new one, or try refilling this one. Stefan -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: Notebook Battery
On Tuesday 17 July 2007 19:19, koffiejunkie shared this with us all: --} Is there anything I can do to improve this, or this battery just on the --} way out? I'm just bothered by the suddeness of this drop in battery --} life - it's been at about an hour for a good six months now, and stayed --} pretty stable. Unless some of the cells just died. --} --} Thanks If you're uncertain about the battery, I have resurrected a battery from a laptop by putting it in a plastic bag and into the freezer for about 4 - 5 hours. then taking it out and recharging it fully. It came back to close enough to new and is still going strong. But your mileage may vary, because a good deal depends on the battery and just how good it is, etc., etc.. The one I did was a Toshiba laptop battery from a lappy I had been given. I have always found that to get the most out of the life of a laptop battery, you have to run it right out, something that, I think, the latest windows won't allow, till it just drops right out. This way there is no memory built up, but when the battery finally does (*) really die. It's dead for ever. As well you have to have a good filesystem like ext3 on the lappy, that will recover from this kind of crash, and of course, manually save everything for the last 3 minutes or so of battery life, and just play a game or something till it crashes, with everything else shut down. The battery will then last for years, or does in my case. I have to use laptops because we have solar power, and have to husband our power and use it frugally. Hope that helps. Charlie -- Registered Linux User:- 329524 +++ He who distinguishes the true savor of his food can never be a glutton; he who does not cannot be otherwise. .Henry David Thoreau Debian - Just the best way to do magic.
