Li-on battery problem

pete70 · 02-23-2007, 02:30 PM

Hi,

First post to the forum, thanks for having me.

I have an Acer travelmate 2500, the battery appears to be on the fritz. Attached are some screenshots from Battery mon for 2 cycles where i ran the laptop on the battery letting it discharge then charged it again. There is a dramatic drop from the 90% to 10/20% charge held.

I have hardly run the laptop on the battery and have just run it on the socket power since I got it around 24 months ago. The battery has stayed in place all that time continually charging which has probably messed it up.

My question is- how do I restore the battery back to a full charge so it continues to hold the charge in an even manner?

cycle1

cycle2

Thanks in advance for any help figuring this out.

JohnthePilot · 02-23-2007, 06:00 PM

Hi there and welcome to the forum.
I know little about batteries, but clicking on this article may give you some ideas until someone with more knowledge answers. It has still not been fully edited so you follow any advice at your own risk.

Rebellion88 · 02-23-2007, 08:32 PM

Firstly using your laptop on the mains all the time will degrade your battery and they usually do naturally too. The only way i get my laptop to take every bit of charge in that it will possibly take is by setting the power scheme so it will run every bit of juice out of the battery. So turn every option down to 0% and leave it to go fully flat. Make sure all your work is saved in the process as this could result in data loss, but then leave your battery to charge fully and, even when it says its full, just disconnect and re-connect. Batteries have a memory so its best to let them go fully flat once in a while.

pete70 · 02-26-2007, 10:51 AM

Well tried the various suggestions but rather than improve its begin to hold less charge.

JohnthePilot · 02-26-2007, 10:57 AM

I'm afarid it looks as though you are going to have to invest in a new battery. If you do, make sure you follow the steps I referred you to earlier to keep the battery in prime condition.

Rebellion88 · 02-26-2007, 06:27 PM

The average battery loses its charge gradually after 12 months. Two years and i think your battery has done rather well, even rechargeable batteries like duracell eventually become less and less powerful. When purchasing a new battery be sure to get the largest cell battery the model has to offer. An 8 cell or above will be what your looking for.

pete70 · 02-27-2007, 11:19 AM

OK fair enough, thanks to you both for your attention.

In case anyone else runs into similar problems I found a good rundown of the technology and care which li-on batteries need at CNET http://forums.cnet.com/5208-7587_102-0.html?forumID=69&threadID=226314&messageID=2362728

02-23-2007, 02:30 PM	#1 (permalink)
pete70 Registered User Join Date: Feb 2007 Posts: 3 OS: XP	Li-on battery problem Hi, First post to the forum, thanks for having me. I have an Acer travelmate 2500, the battery appears to be on the fritz. Attached are some screenshots from Battery mon for 2 cycles where i ran the laptop on the battery letting it discharge then charged it again. There is a dramatic drop from the 90% to 10/20% charge held. I have hardly run the laptop on the battery and have just run it on the socket power since I got it around 24 months ago. The battery has stayed in place all that time continually charging which has probably messed it up. My question is- how do I restore the battery back to a full charge so it continues to hold the charge in an even manner? cycle1 cycle2 Thanks in advance for any help figuring this out.

02-23-2007, 06:00 PM	#2 (permalink)
JohnthePilot Manager, TSF Articles Join Date: Mar 2006 Location: Cheltenham, near Wales. Posts: 30,099 OS: XP Home SP3, PCLinux, Vista Home Premium SP1 My System Blog Entries: 1	Hi there and welcome to the forum. I know little about batteries, but clicking on this article may give you some ideas until someone with more knowledge answers. It has still not been fully edited so you follow any advice at your own risk. __________________ Submit New Articles Here If you feel that TSF has helped you please make a donationand help to keep the forum free Cenedl heb iaith, cenedl heb galon Folding@Home - Team 85015

02-23-2007, 08:32 PM	#3 (permalink)
Rebellion88 Registered User Join Date: Dec 2006 Location: London, UK Posts: 441 OS: Windows Vista Home Premium 32bit My System	Firstly using your laptop on the mains all the time will degrade your battery and they usually do naturally too. The only way i get my laptop to take every bit of charge in that it will possibly take is by setting the power scheme so it will run every bit of juice out of the battery. So turn every option down to 0% and leave it to go fully flat. Make sure all your work is saved in the process as this could result in data loss, but then leave your battery to charge fully and, even when it says its full, just disconnect and re-connect. Batteries have a memory so its best to let them go fully flat once in a while. __________________ - Dean National Diploma Software Development National Diploma Hardware Route

02-26-2007, 10:57 AM	#5 (permalink)
JohnthePilot Manager, TSF Articles Join Date: Mar 2006 Location: Cheltenham, near Wales. Posts: 30,099 OS: XP Home SP3, PCLinux, Vista Home Premium SP1 My System Blog Entries: 1	I'm afarid it looks as though you are going to have to invest in a new battery. If you do, make sure you follow the steps I referred you to earlier to keep the battery in prime condition. __________________ Submit New Articles Here If you feel that TSF has helped you please make a donationand help to keep the forum free Cenedl heb iaith, cenedl heb galon Folding@Home - Team 85015

02-26-2007, 06:27 PM	#6 (permalink)
Rebellion88 Registered User Join Date: Dec 2006 Location: London, UK Posts: 441 OS: Windows Vista Home Premium 32bit My System	The average battery loses its charge gradually after 12 months. Two years and i think your battery has done rather well, even rechargeable batteries like duracell eventually become less and less powerful. When purchasing a new battery be sure to get the largest cell battery the model has to offer. An 8 cell or above will be what your looking for. __________________ - Dean National Diploma Software Development National Diploma Hardware Route

02-26-2007, 10:51 AM	#4 (permalink)
pete70 Registered User Join Date: Feb 2007 Posts: 3 OS: XP	Well tried the various suggestions but rather than improve its begin to hold less charge.

02-27-2007, 11:19 AM	#7 (permalink)
pete70 Registered User Join Date: Feb 2007 Posts: 3 OS: XP	OK fair enough, thanks to you both for your attention. In case anyone else runs into similar problems I found a good rundown of the technology and care which li-on batteries need at CNET http://forums.cnet.com/5208-7587_102-0.html?forumID=69&threadID=226314&messageID=2362728