Interestingly, I have access to a number of laptops. 3 of those are Lenovo G570 systems which came with Windows 7. There have a charger mode that turns of the charger at 80% (I think it is) and then turns it on when the battery gets down to ~40%. Unfortunately Ubuntu does not have such an option. And my Lenovo x220 does not seem to either, but it does shut off the charger when the battery reaches 100% whether the machine is on or not. As a general rule, I only plug in laptop chargers when needed or when I will have it on for a long period of time or don't want the hassle of constant screen dimming. On Sun, May 6, 2012 at 6:35 PM, Michael Havens wrote: > I got the cheapest black friday sale laptop they had at walmart. It is a > bitchin computer!!! > > > On Sun, May 6, 2012 at 6:18 PM, keith smith wrote: > >> >> I run 2 laptops all day - about 14 hours a day. I pulled both >> batteries. They are in my desk drawer where they have been for 4+ months. >> >> Your saying it is better to just leave the battery in the laptop at 100% >> than to remove it? >> >> I wonder what they life expectancy is? What would be your guess? >> >> I never take the these two laptops off A/C. >> >> I when to laptops last year in the hope of less heat. And I buy cheap >> laptops. Both were on sale. Cheaper than a desktop. >> >> ------------------------ >> Keith Smith >> >> --- On *Sun, 5/6/12, Jim March <1.jim.march@gmail.com>* wrote: >> >> >> From: Jim March <1.jim.march@gmail.com> >> Subject: Re: laptop battery cycling >> To: "Main PLUG discussion list" >> Date: Sunday, May 6, 2012, 4:34 PM >> >> My VERY limited understanding is, the problem isn't "overcharging" >> exactly. It's that Li-Ion batteries are weird. They last longest when >> charged between 50% and 80% - as opposed to 100%. But bad news: >> maintaining the battery at a level below 20% is just as bad as keeping it >> at 100% if not worse, so...leaving it out really isn't a good solution >> either. >> >> What we REALLY need is a switch or setting in the laptop that will cause >> a 100% charge when you know you'll need more battery life soon, otherwise >> the default charge level is maintained at around 75%. But that would >> confoose too many people...might be a good FOSS project for geeks though? >> >> Failing that, the best solution is to leave it in there. Yes, the >> battery will slowly degrade. But, at least you have protection from a >> sudden crash if you accidentally the power plug :(. If you can afford it, >> run two batteries - swapping once every week or two (or however long it >> takes for it to naturally drain to about 50%), with the one about to go on >> the shelf being deliberately drained to about 80% first. >> >> Jim >> >> On Sun, May 6, 2012 at 4:17 PM, Robert Holtzman >> > wrote: >> >> For the record, I'm running a Lenovo T420i with a 6 cell battery. >> >> In the past I've been told that it's bad practice to run a laptop on AC >> with the battery installed because it would cause reduced battery >> capacity. This raises two questions. First, is it true that laptop >> batteries don't have overcharge protection, and second, how many cycles >> is a battery like mine good for? >> >> -- >> Bob Holtzman >> If you think you're getting free lunch, >> check the price of the beer. >> Key ID: 8D549279 >> >> -----BEGIN PGP SIGNATURE----- >> Version: GnuPG v1.4.10 (GNU/Linux) >> >> iEYEARECAAYFAk+nBncACgkQv5BYD41UknmLzgCZAdcVTtb1rXlcYNq15fkxqieJ >> hP4AoJbCgJ0yPgIsMqdCGeNvWOBnQ2pz >> =chRS >> -----END PGP SIGNATURE----- >> >> --------------------------------------------------- >> PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us >> To subscribe, unsubscribe, or to change your mail settings: >> http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss >> >> >> >> -----Inline Attachment Follows----- >> >> --------------------------------------------------- >> PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us >> To subscribe, unsubscribe, or to change your mail settings: >> http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss >> >> >> --------------------------------------------------- >> PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us >> To subscribe, unsubscribe, or to change your mail settings: >> http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss >> > > > > -- > :-)~MIKE~(-: > > --------------------------------------------------- > PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us > To subscribe, unsubscribe, or to change your mail settings: > http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss > -- Dazed_75 a.k.a. Larry Please protect my address like I protect yours. When sending messages to multiple recipients, always use the BCC: (Blind carbon copy) and not To: or CC:. Remove all addresses from the message body before sending a Forwarded message. This can prevent spy programs capturing addresses from the recipient list and message body.