Date: Sun, 30 Sep 2012 23:38:27 +1000 (EST) From: Ian Smith <smithi@nimnet.asn.au> To: =?windows-1251?B?y/7h7uzo8CDD8Ojj7vDu4g==?= <nm.knife@gmail.com> Cc: freebsd-mobile@freebsd.org Subject: Re: Turning off battery while on AC Message-ID: <20120930220701.I43208@sola.nimnet.asn.au> In-Reply-To: <CAHi1Jscm5PcOf4_EXZkuvGKQfUn_efO7TK7YDTdO=nznTj6ARw@mail.gmail.com> References: <CAHi1Jscm5PcOf4_EXZkuvGKQfUn_efO7TK7YDTdO=nznTj6ARw@mail.gmail.com>
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On Fri, 28 Sep 2012 13:01:02 -0700, nm.knife@gmail.com wrote: > Sorry if this has been answered, but is there a way to set a laptop (I have > ThinkPad X220) not to draw energy from the battery when it's on AC? In > Windows once the battery is not charging and you are on AC, the battery is > totally bypassed. You can imagine this being better than it constantly > charging and being used. > > Is this something that is hardware built in, or is it controlled by the OS? > Is there an equivalent in FreeBSD? (or maybe GNU/Linux)? What indicates that it's using energy from the battery while on AC? Please show: % acpiconf -i0 when the battery is fully charged and running on AC power? Earlier Thinkpads (I have a couple of T23s) always fully charge the battery then disconnect it, letting it slowly self-discharge until the reported capacity drops to ~95%, over some days usually, when it gets boosted back to 100% IBM were careful not to trickle-charge Li-Ion batteries, avoiding risk of fire or explosion - Lenovo too, I guess. If yours is not behaving like that, then acpiconf -i0 should show something happening on 'Present rate', which shows charge rate during charging, and discharge rate while running from battery. When fully charged (State: high) running on AC, it should show 0mW (on some, mA): smithi on t23% acpiconf -i0 Design capacity: 43200 mWh Last full capacity: 31850 mWh Technology: secondary (rechargeable) Design voltage: 10800 mV Capacity (warn): 2160 mWh Capacity (low): 432 mWh Low/warn granularity: 1 mWh Warn/full granularity: 1 mWh Model number: IBM-02K7026 Serial number: 932 Type: LION OEM info: Panasonic State: high Remaining capacity: 100% Remaining time: unknown Present rate: 0 mW Present voltage: 12381 mV > Lyubomir Grigorov (bgalakazam) cheers, Ian
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