Date: Wed, 26 Sep 2012 02:10:21 +0200 From: Michael Schuh <michael.schuh@gmail.com> To: Brandon Allbery <allbery.b@gmail.com> Cc: FreeBSD Stable <freebsd-stable@freebsd.org> Subject: Re: battery state - hw.acpi.battery.life goes only down Message-ID: <CADwRVEZoa5EH5msXAv069KCG1TQ%2B=S95z5PXaq%2B9V2zuma2j4g@mail.gmail.com> In-Reply-To: <CAKFCL4UHVOcaq-9wU2ePbEU=K4gtck%2B8Ro2AEf6nT8D8QJc%2BNQ@mail.gmail.com> References: <CADwRVEYhb4BqkuOu2rgOLpHBbmm4UaAhsLjLLurMuRs4giL-0A@mail.gmail.com> <CAKFCL4UHVOcaq-9wU2ePbEU=K4gtck%2B8Ro2AEf6nT8D8QJc%2BNQ@mail.gmail.com>
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2012/9/26 Brandon Allbery <allbery.b@gmail.com> > On Tue, Sep 25, 2012 at 7:43 PM, Michael Schuh <michael.schuh@gmail.com>w= rote: > >> this wrong number seems persistent during a reboot. >> i tested this, shortly. >> the battery life after reboot was 97% with power supply plugged in all t= he >> times. >> >> after a clean boot the system camed up with a battery.life of 97% ( powe= r >> supply plugged in :O ). >> > > Sounds like normal lithium ion charger behavior to me; typically they > won't kick in the charger until it reaches somewhere between 90-95% > (depends on the device). This extends the useful life of the battery; ra= w > lithium ion is just as (actually, more) prone to destruction via > overcharging as other battery technologies. > > http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries= discusses this. Note in particular: "A continuous trickle charge would > cause plating of metallic lithium, and this could compromise safety." > > -- > brandon s allbery allbery.b@gmail.co= m > wandering unix systems administrator (available) (412) 475-9364 vm/sm= s > > hmm, may be. i didn't thinked about that lithium charging feature. you may right with that. but one point, this behaviour is new. i made some tests to check if my conkyrc is right and there i haven't wait that the battery is gone under 90% for checking this. after i could confirm that the conkyrc is syntactically correct, the battery reached 100% again. that was before i updated the system last week. i will check that out. under the load of a make world it should only take minutes to get the battery.life under 80%. many thanks for your hint. --=20 =3D =3D =3D http://michael-schuh.net/ =3D =3D =3D Projektmanagement - IT-Consulting - Professional Services IT Michael Schuh Postfach 10 21 52 66021 Saarbr=FCcken phone: 0681/8319664 mobil: 0175/5616453 @: m i c h a e l . s c h u h @ g m a i l . c o m =3D =3D =3D Ust-ID: DE251072318 =3D =3D =3D
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