New Posts  All Forums:Forum Nav:

4750 Battery problem part 2

post #1 of 16
Thread Starter 
Hello again, I just wanted to update you all on what I've come to find about my problem with the 4750 not charging its batterys while in windows. I wrote tech support about the problem and I want to share their reply with you:
-------------------Start of Email------------------------
> -----Original Message-----
> From: Ryan Quigley
> Sent: Monday, July 11, 2005 11:11 PM
> To: techsupport@sagernotebook.com
> Subject: 4750 battery issue (Thread:39651)
>
>
> Hi, my 4750 will not charge its battery while
> running
> windows. I've tried different things software
> related,
> but nothing seems to work. The battery will only
> charge when the computer is shut down. Have you
> heard
> of this before? If so, is it possible for me to
> fix it
> or do I need to send it in? The computer was
> purchased
> around late december of 2004.
>
> Thank you,
> Ryan

> Sager Tech Supports
> <TechSupport@SagerNotebook.com> wrote:
> That is normal, since the battery charging is
> base on the heat sensor,
> when
> th eunit is running and is hot it will cut off
> the charge, so is better
> let
> the unit and the battery both are cool down
> first, then plug in the AC
> start
> to charge, and when is charging, don't power on
> the unit.
>
>
> David Liu
> Sager Notebook Computer Inc.
> 18005 Cortney CT.
> City of Industry, CA. 91748
> Tech Support Dept.
>
>
> -----Original Message-----
> From: Ryan Quigley
> Sent: Tuesday, July 12, 2005 12:14 PM
> To: Sager Tech Supports
> Subject: RE: 4750 battery issue (Thread:39651)
>
>
> David, I might buy that except for the fact that I
> used to have no problem
> charging the unit while running windows, so what
> changed? Perhaps the heat
> sensor is faulty then, because I will have the
> laptop well ventilated so
> that it cannot overheat, and still it will not
> charge. This is extremely
> frusterating that my $2000 laptop will not charge
> unless I shut it down, and
> I would like to fix the problem. Please don't tell
> me that this is normal,
> because EVERY other laptop (including this unit) I
> have used will charge its
> battery while running.
>
> ~Ryan
>

> Sager Tech Supports
> <TechSupport@SagerNotebook.com> wrote:
Even it can charge in windows when the unit get hot, it will cut off the charge so the battery stil can't get the full charge in windows so is better charge the battery when the unit is not use and is cold, then plug in the ac to charge..
because we don't test the battery charge when th eunit is on, if you want sent it back we only can test the battery can take the charge when the unit is off, so try it if the battery can't take fully charge when the unit is off then the battery is bad. let me know after you try that then i can issue the RMA# ..



David Liu
Sager Notebook Computer Inc.
18005 Cortney CT.
City of Industry, CA. 91748
Tech Support Dept.

-----------------------End of Email---------------------

So, I am asking you all now, can you in fact charge your 4750 battery while in windows, or do you all have to shut down your computers to charge also?

Thanks for your help,
Ryan
post #2 of 16
My computer is plugged in nearly 100% of the time, so the battery is always full, but on those rare occasions I use the battery, I don't have to turn it off to charge it back up. However, because the unit is always plugged in, I have no idea how long it takes to charge, but I know it DOES charge while in Windows.

Download battermon: http://www.softpedia.com/progDownloa...load-7529.html

That's a 30 day trial above. It will show you even the smallest change in battery charge.

I'm gonna unplug my computer, run it for a while to lower the battery, then plug it back in to see how fast my battery charges in windows for you. I'll post back when i'm done.
post #3 of 16
2005-07-13 11:41:55 - Battery 6%
2005-07-13 13:35:55 - Battery 43%

Looks like about 20% an hour, idling at 54 degrees IN windows.

I'll just have to assume the battery charging is causing that extra heat, cause usually I idle between 39-42 degrees. However, as you can see, it is charging fine in Windows, even with a very hot temperature inside.
post #4 of 16
Thread Starter 
Thanks for the prompt reply. I've tried using other battery monitors, but they report the same as the windows monitor. My unit used to charge while in windows, slowly, but it would charge. Not anymore, though, the battery level will stay the same, and if I unplug it, the battery will drain from that point, so the level isn't being misreported. I really hope that Sager will do something about this for me.
post #5 of 16
Quote:
Originally Posted by GitarGr8
Hello again, I just wanted to update you all on what I've come to find about my problem with the 4750 not charging its batterys while in windows. I wrote tech support about the problem and I want to share their reply with you:
-------------------Start of Email------------------------
> -----Original Message-----
> From: Ryan Quigley
> Sent: Monday, July 11, 2005 11:11 PM
> To: techsupport@sagernotebook.com
> Subject: 4750 battery issue (Thread:39651)
>
>
> Hi, my 4750 will not charge its battery while
> running
> windows. I've tried different things software
> related,
> but nothing seems to work. The battery will only
> charge when the computer is shut down. Have you
> heard
> of this before? If so, is it possible for me to
> fix it
> or do I need to send it in? The computer was
> purchased
> around late december of 2004.
>
> Thank you,
> Ryan

> Sager Tech Supports
> <TechSupport@SagerNotebook.com> wrote:
> That is normal, since the battery charging is
> base on the heat sensor,
> when
> th eunit is running and is hot it will cut off
> the charge, so is better
> let
> the unit and the battery both are cool down
> first, then plug in the AC
> start
> to charge, and when is charging, don't power on
> the unit.
>
>
> David Liu
> Sager Notebook Computer Inc.
> 18005 Cortney CT.
> City of Industry, CA. 91748
> Tech Support Dept.
>
>
> -----Original Message-----
> From: Ryan Quigley
> Sent: Tuesday, July 12, 2005 12:14 PM
> To: Sager Tech Supports
> Subject: RE: 4750 battery issue (Thread:39651)
>
>
> David, I might buy that except for the fact that I
> used to have no problem
> charging the unit while running windows, so what
> changed? Perhaps the heat
> sensor is faulty then, because I will have the
> laptop well ventilated so
> that it cannot overheat, and still it will not
> charge. This is extremely
> frusterating that my $2000 laptop will not charge
> unless I shut it down, and
> I would like to fix the problem. Please don't tell
> me that this is normal,
> because EVERY other laptop (including this unit) I
> have used will charge its
> battery while running.
>
> ~Ryan
>

> Sager Tech Supports
> <TechSupport@SagerNotebook.com> wrote:
Even it can charge in windows when the unit get hot, it will cut off the charge so the battery stil can't get the full charge in windows so is better charge the battery when the unit is not use and is cold, then plug in the ac to charge..
because we don't test the battery charge when th eunit is on, if you want sent it back we only can test the battery can take the charge when the unit is off, so try it if the battery can't take fully charge when the unit is off then the battery is bad. let me know after you try that then i can issue the RMA# ..



David Liu
Sager Notebook Computer Inc.
18005 Cortney CT.
City of Industry, CA. 91748
Tech Support Dept.

-----------------------End of Email---------------------

So, I am asking you all now, can you in fact charge your 4750 battery while in windows, or do you all have to shut down your computers to charge also?

Thanks for your help,
Ryan

li-Ion batteries do have circuitry built into them that carefully measures and determines when to charge (or not) the cells. This circuitry includes temperature sensors that can control the charging process. It is possible that you may have a defective battery. Either a defect on the cells, cell packaging or the circuitry in the battery.

Most manufacturers report life spans of 2 to 3 years for these batteries provided that you reduce the number of recharge cycles. In other words, never let your battery run down completely as that appears to shave a significant slice off the battery's life.


regards

MS
post #6 of 16
Thread Starter 
that is interesting that you say not to let the battery run out of juice, as I have heard from many different places that letting the battery run all the way down will actually help improve battery life. do you know if the "heat sensor" is on the battery itself? Hopefully Sager will do a cross ship for an RMA for a battery...

Thanks again for all the help.
post #7 of 16
Quote:
Originally Posted by GitarGr8
that is interesting that you say not to let the battery run out of juice, as I have heard from many different places that letting the battery run all the way down will actually help improve battery life. do you know if the "heat sensor" is on the battery itself? Hopefully Sager will do a cross ship for an RMA for a battery...

Thanks again for all the help.
I can tell you categorically, that if you let the charge deplete to zero, the battery circuitry will actually cut off power preventing the voltage from getting to dangerously low levels. If the voltage gets to very low levels the battery will heat up as the Litium will become unstable an no longer easily contained as most manufacturers intended. This is true especially for Li-Ion batteries.

The circuitry in the battery is there to ensure that the voltage remains within safe levels at all times- and it will even recharge (or prevent total discharge) when needed.

A Li-Ion will (according to most manuacturers) have a longer life span if it is kept always a good charge level. Everytime a "full" cycle is incurred the battery will hold less capacity faster (and hence a shorter life span) than being kept under full charge as often as possible.

regards;

MS
post #8 of 16
Funny thing... after trying to help you out with your battery, my battery stopped charging.

I spent a few hours installing Gentoo on an external drive (On AC power the entire time) and come back to Windows and it reports that, while on AC power, my battery has drained to 75%. I notice it is not charging at all (No increase in %, and the middle led light on under the screen that normally blinks when charging isn't blinking) I assume that it's full and windows is just mis-reporting it (after all, it was on AC the entire time), so I unplug it for a while, let it drain to 68%, and plug it back in. Still no charging.

Current CPU temp: 39
HDD temp: 49


My HDD is a bit hot, maybe that's stopping it from charging...
We'll see if it starts charging later i guess
post #9 of 16
Well, it charged. Who knows.
post #10 of 16
If you do not have the AMD PowerNOW! driver installed and the processor is stuck using full speed, it will probably be incapable of charging while in windows.

The equivilent in linux
Power profile:
... ondemand (801-1803mhz): charges very slowly depending on if I am reading something or flipping through things.
... performance (1803mhz): cannot/does not charge.
... powersave (801mhz): As long as I don't try to game, it will charge.

I suspect the same follows for the same with windows. This inability to charge is likely caused by the battery load restriction (no greater than 120watts or something like that), heat caused by the current charging AND computer activity, and well, age of the battery. Dunno if this is true or not, I just know this through observation.
post #11 of 16
Thread Starter 
well, im using winxp pro and the processor isn't stuck on full speed and still no charge while in windows. It will only charge while it is turned off. I had a problem with the "port" that the power plug fits into coming off of the mainboard, but I was able to solder it back on, still not able to charge in windows. Oh well...
post #12 of 16
My 4750 charges just fine while running. Mine charges faster than 20% an hour though. I'm not sure quite what the numbers are, but it does charger faster than that. Of course, that's most likely because it's less than two months old.
post #13 of 16

Instruction Manual

I noticed the post about not de-charging fully and remembered a part in the instruction booklet which says the first couple of charges it is best to decharge the battery fully (until the machine switches off) then fully re-charge the battery with the power off to condition the battery after purchase.

Furthering the discussion, my 470k de-charges anything between 1and 2 hrs dependant on load and re-charges in windows in about 2-3hrs I almost always let it get down to 5% charge before plugging it in as I have heard that full discharge cycles are best to prevent battery memory (tho this isnt meant to be a problem in Lithium ION batterys)
post #14 of 16
yah, I think the manual was made for the NiCad or whatever batteries, I don't think it was updated for the Lithium Ion... I think I read somewhere that LiOn batteries are actually happier NOT being fully discharged, but I'm not sure.
post #15 of 16
i would almost say the power brick could be bad, i saw this happen to an ibm laptop at my school where the power brick could not supply all the wattage required
post #16 of 16
These 4750's are pieces of crap. I have two of them. The bad thing is that I'm a reseller for Sager. They will not help me at all and they always claim that it's being abused One of mine won't hold a charge at all. The other one just stopped charging. I've had the AC plug break off the motherboard twice!!! They were suppose to reinforce it, but never did. My other one broke off once. I decided to hot glue them in to place. Now my other computer says it's running at full speed, but it's only at 802Mhz!! On top of that I believe that the memory went bad in it.

Honestly, I doubt it that you will get any kind of acceptable response from them. I have had these computers for 1 year 4 months. If they won't help me out and I'm a reseller...what will they do for you? I wonder if PCTorque has problems with that. Anyway...rant off. I would like to know if you get the battery problem fixed.
New Posts  All Forums:Forum Nav:
  Return Home