The battery health indicator give me 5 lights when pressed.. Your saying it could be a faulty battery, would fully charging tonight then pulling the battery out for the night then put it back in the morning to see if it drained at all give me a indication its the battery???
I have just re-read your first post - and I think I have misinterpreted it.I actually thought the battery had only 11% charge left (100%-89%) that indeed would have been a serious problem......
Sorry about that.
But 89% seems to be OK !! No need to worry about battery.Just observe the measured values over the next couple of weeks and you will realise that they are more or less the same.
Really? None of our other Dell Laptops (Vostro, Studio, Inspiron or Latitude) lose that much power overnight.. 11% in less then 7 hours just sounds too high for static loss.. I'm going to pull the battery tonight and see if it discharges disconnected from my XPS, that should eliminate one of the two as being the problem (Laptop or Battery)
Yes - you can do that and I wanted to suggest it myself until I realized my error....
Nevertheless-I do not know how precise the battery meter of windows 7 is.The battery capacity calculation of my own battery is sometimes quite different ranging between +/-15% and more (especially after turning on the laptop)even though I know that can't be true.
To measure the capacity it is necessary to observe the voltage and current over time.This has to be done in time intervals to get as many values as possible to be able to calculate the average.The resulting average value is more realistic over a long period of time.So usually I do not care what the battery meter is telling me short term-wise.
Sleep mode is not a static loss! In sleep mode the contents of your current windows session is stored in RAM - your memory modules.RAM modules do require power - although very little - to avoid data loss.They will drain your battery after a while (but not within 24hours)
Well I think its safe to say its the XPS draining the battery, with the battery fully charged and removed then reinstalled after 8.5 hours it lost only 1%, I lost 4 times that with the laptop shutdown for only 4 hours... So the question is what is draining the battery when my XPS is in sleep mode or shut off???
Sidenote: I haven't been using Win. 7's battery for these tests rather the newest version of "Battery Meter" Gadget which runs in realtime showing Remaining Time, Volts, Discharge rate, current Charge and Maximum Charge.
Lipo batteries Self Discharge at a faster rate based on temperature. Lithium polymer batteries can be stored removed from the laptop for one or two months without significantly losing charge. However, if storing for long periods, manufacturers recommend discharging the battery to 50% of full charge. In addition, other sources recommend refrigerating (but not freezing) the cell.
Storing them for a year or more without charging will result in cells dropping below 3V and then they will refuse to ever charge again. Deep discharge is not recommended ever.
This is why keeping them in a Cool Dry place helps.
As batteries age they hold less charge for a shorter period of time until they just don't work anymore.
It's quite bizarre as the laptop is obviously perfectly functioning.
If I knew that my laptop is draining the battery I would remove the harddrive,cdrom drive,memory modules and any other removable parts like external USB devices to find the possible culprit.
But before starting this lenghty procedure leave the fully charged battery connected to the laptop and observe its charge over a couple of days - battery meter gadgets are nice but I wouldn't totally rely on them.
Thanks Micro, I'm not about to start pulling all components out one by one, if the computer is off none of these internal devices should be drawing power and if they are it's not the component rather the MB... My XPS is still under full warranty so I may be making a service call, seems there's a issue with the fan or whatever controls it for it has been racing oflate, yesterday I had to reboot this XPS because the fan was maxed out, so much so the noise it was making was ungodly.. I'm thinking this XPS 1530 is experiancing issues many others have had concerning the MB/nVidia GeForce 8600..
speedstep
9 Legend
•
47K Posts
0
October 6th, 2011 09:00
Sleep Mode is not off its just reduced power.
Paul T
83 Posts
0
October 6th, 2011 11:00
I thought maybe that was the case so I did a complete Shut down and came back 4 hours later and lost 6%... Anyone???
MicroTest
3 Apprentice
•
934 Posts
0
October 6th, 2011 13:00
Sleep mode should not drain your battery within 24 hours !
Charge the battery and use the laptop without the AC-charger.How long does it take for the battery to completely discharge?
Even a new battery could be faulty.............
Paul T
83 Posts
0
October 6th, 2011 15:00
The battery health indicator give me 5 lights when pressed.. Your saying it could be a faulty battery, would fully charging tonight then pulling the battery out for the night then put it back in the morning to see if it drained at all give me a indication its the battery???
MicroTest
3 Apprentice
•
934 Posts
0
October 6th, 2011 16:00
I have just re-read your first post - and I think I have misinterpreted it.I actually thought the battery had only 11% charge left (100%-89%) that indeed would have been a serious problem......
Sorry about that.
But 89% seems to be OK !! No need to worry about battery.Just observe the measured values over the next couple of weeks and you will realise that they are more or less the same.
Paul T
83 Posts
0
October 6th, 2011 21:00
Really? None of our other Dell Laptops (Vostro, Studio, Inspiron or Latitude) lose that much power overnight.. 11% in less then 7 hours just sounds too high for static loss.. I'm going to pull the battery tonight and see if it discharges disconnected from my XPS, that should eliminate one of the two as being the problem (Laptop or Battery)
MicroTest
3 Apprentice
•
934 Posts
0
October 7th, 2011 05:00
Yes - you can do that and I wanted to suggest it myself until I realized my error....
Nevertheless-I do not know how precise the battery meter of windows 7 is.The battery capacity calculation of my own battery is sometimes quite different ranging between +/-15% and more (especially after turning on the laptop)even though I know that can't be true.
To measure the capacity it is necessary to observe the voltage and current over time.This has to be done in time intervals to get as many values as possible to be able to calculate the average.The resulting average value is more realistic over a long period of time.So usually I do not care what the battery meter is telling me short term-wise.
Sleep mode is not a static loss! In sleep mode the contents of your current windows session is stored in RAM - your memory modules.RAM modules do require power - although very little - to avoid data loss.They will drain your battery after a while (but not within 24hours)
Let me know the outcome of your test !
Paul T
83 Posts
0
October 7th, 2011 06:00
Well I think its safe to say its the XPS draining the battery, with the battery fully charged and removed then reinstalled after 8.5 hours it lost only 1%, I lost 4 times that with the laptop shutdown for only 4 hours... So the question is what is draining the battery when my XPS is in sleep mode or shut off???
Sidenote: I haven't been using Win. 7's battery for these tests rather the newest version of "Battery Meter" Gadget which runs in realtime showing Remaining Time, Volts, Discharge rate, current Charge and Maximum Charge.
speedstep
9 Legend
•
47K Posts
0
October 7th, 2011 07:00
Lipo batteries Self Discharge at a faster rate based on temperature. Lithium polymer batteries can be stored removed from the laptop for one or two months without significantly losing charge. However, if storing for long periods, manufacturers recommend discharging the battery to 50% of full charge. In addition, other sources recommend refrigerating (but not freezing) the cell.
Storing them for a year or more without charging will result in cells dropping below 3V and then they
will refuse to ever charge again. Deep discharge is not recommended ever.
This is why keeping them in a Cool Dry place helps.
As batteries age they hold less charge for a shorter period of time until they just don't work anymore.
MicroTest
3 Apprentice
•
934 Posts
0
October 7th, 2011 07:00
It's quite bizarre as the laptop is obviously perfectly functioning.
If I knew that my laptop is draining the battery I would remove the harddrive,cdrom drive,memory modules and any other removable parts like external USB devices to find the possible culprit.
But before starting this lenghty procedure leave the fully charged battery connected to the laptop and observe its charge over a couple of days - battery meter gadgets are nice but I wouldn't totally rely on them.
Paul T
83 Posts
0
October 12th, 2011 06:00
Thanks Micro, I'm not about to start pulling all components out one by one, if the computer is off none of these internal devices should be drawing power and if they are it's not the component rather the MB... My XPS is still under full warranty so I may be making a service call, seems there's a issue with the fan or whatever controls it for it has been racing oflate, yesterday I had to reboot this XPS because the fan was maxed out, so much so the noise it was making was ungodly.. I'm thinking this XPS 1530 is experiancing issues many others have had concerning the MB/nVidia GeForce 8600..