427 lines
8.0 KiB
HTML
427 lines
8.0 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<HTML
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><HEAD
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><TITLE
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>Batteries</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
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REL="HOME"
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TITLE="Linux on the Road"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="Hardware in Detail: CPU, Display, Keyboard, Sound and More"
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HREF="mobile-guide-p2c1-hardware-in-detail.html"><LINK
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REL="PREVIOUS"
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TITLE="Power Management Unit - PMU (PowerBook)"
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HREF="mobile-guide-p2c1s10-pmu.html"><LINK
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REL="NEXT"
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TITLE="Memory"
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HREF="mobile-guide-p2c1s12-memory.html"></HEAD
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><BODY
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CLASS="sect1"
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BGCOLOR="#FFFFFF"
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TEXT="#000000"
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LINK="#0000FF"
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VLINK="#840084"
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ALINK="#0000FF"
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><DIV
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CLASS="NAVHEADER"
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><TABLE
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SUMMARY="Header navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLSPACING="0"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>Linux on the Road: </TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="mobile-guide-p2c1s10-pmu.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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>Chapter 12. Hardware in Detail: CPU, Display, Keyboard, Sound and More</TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="mobile-guide-p2c1s12-memory.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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></TABLE
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="sect1"
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><H1
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CLASS="sect1"
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><A
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NAME="mobile-guide-p2c1s11-batteries"
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></A
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>12.21. Batteries</H1
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><TABLE
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BORDER="0"
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WIDTH="100%"
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CELLSPACING="0"
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CELLPADDING="0"
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CLASS="EPIGRAPH"
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><TR
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><TD
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WIDTH="45%"
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> </TD
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><TD
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WIDTH="45%"
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ALIGN="LEFT"
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VALIGN="TOP"
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><I
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><P
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><I
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>May the batteries be with you.</I
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></P
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></I
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></TD
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></TR
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><TR
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><TD
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WIDTH="45%"
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> </TD
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><TD
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WIDTH="45%"
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ALIGN="RIGHT"
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VALIGN="TOP"
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><I
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><SPAN
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CLASS="attribution"
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> Unknown AuthorEss
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</SPAN
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></I
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></TD
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></TR
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></TABLE
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><P
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> For information about available battery types, take a
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look at the Hardware Features chapter above.
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</P
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><P
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> Please see the
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<A
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HREF="http://tldp.org/HOWTO/Battery-Powered/"
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TARGET="_top"
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>Battery Powered Linux Mini-HOWTO</A
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>
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and the
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<A
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HREF="http://tuxmobil.org/mobile_battery.html"
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TARGET="_top"
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>TuxMobil battery page</A
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>
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for further information. A survey of
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<A
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HREF="http://tuxmobil.org/energy_laptops.html"
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TARGET="_top"
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>other means to supply power for mobile computers</A
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>
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e.g. solar energy is available at TuxMobil.
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For general information about batteries see the
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<A
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HREF="http://www.technick.net/public/code/cp_dpage.php?aiocp_dp=guide_bpw2_00_toc"
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TARGET="_top"
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>Battery FAQ</A
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>.
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</P
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><P
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> <A
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HREF="http://www.canb.auug.org.au/~sfr/"
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TARGET="_top"
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>Stephen Rothwell</A
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>
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proposed a patch that will add multiple battery support to the kernel APM.
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</P
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><P
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> From the <B
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CLASS="command"
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>mobile-update</B
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> page
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(modified by WH): Discharge the battery. If your
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battery runs only for about 20 minutes, you probably
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suffer from memory effects. Most laptops do not
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discharge the battery properly. With low powered
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devices like old computer fans they can be discharged
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completely. This removes memory effects. You should
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do so even with LiIon batteries, though they don't
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suffer much from memory effect (the manual of
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an <SPAN
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CLASS="trademark"
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>IBM</SPAN
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>™ Thinkpad says
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to cycle the batteries through a full
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charge/discharge cycle 3 times every few
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months or so).
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</P
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><DIV
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CLASS="warning"
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><P
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></P
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><TABLE
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CLASS="warning"
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WIDTH="100%"
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BORDER="0"
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><TR
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><TD
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WIDTH="25"
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ALIGN="CENTER"
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VALIGN="TOP"
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><IMG
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SRC="../images/warning.gif"
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HSPACE="5"
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ALT="Warning"></TD
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><TD
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ALIGN="LEFT"
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VALIGN="TOP"
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><P
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> Try this at your own risk! Make sure the voltage of
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the fans is compatible to your battery. It works
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for me.
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</P
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></TD
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></TR
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></TABLE
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></DIV
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><P
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> In the US, this company has most batteries for
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anything and can rebuild many that are no longer
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manufactured: Batteries Plus, 2045 Pleasant Hill
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Road, Duluth, GA 30096 +1 770 495 1644.
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</P
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><P
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> The
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<A
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HREF="http://karl.jorgensen.com/battery-stats/"
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TARGET="_top"
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>battery-stats</A
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>
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package collects statistics about the (lack of)
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charge on laptop batteries. It also contains a simple graph
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utility to show the battery charge over time or detect
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a misbehaviour of the battery which might announce a
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coming end of batterylife.
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Battery-stats knows nothing about electrochemical stuff going on
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inside batteries - hence it will not try to make any predictions
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whatsoever. But somebody with knowledge of batteries should be able
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to tell whether they are behaving OK.
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This package uses APM; there is no support for ACPI yet.
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</P
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><P
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> <A
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HREF="http://ibam.sourceforge.net/"
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TARGET="_top"
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>IBAM (Intelligent BAttery Monitor)</A
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>
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is an advanced battery monitor
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for laptops, which uses statistical and adaptive linear methods to provide
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accurate estimations of minutes of battery left or of the time needed until
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full recharge.
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This package uses APM; there is no support for ACPI yet.
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</P
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><P
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> <A
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HREF="http://www-leland.stanford.edu/~bbense/toys/"
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TARGET="_top"
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>A hacked rclock</A
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>
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. Booker C. Bense has hacked the <EM
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>rclock</EM
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> program
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to include a simple battery power meter on the clock face.
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</P
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><P
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> <A
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HREF="http://www.jaist.ac.jp/~daisuke/Linux/xbatstat.html"
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TARGET="_top"
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>xbatstat</A
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>
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. A battery level status checker for Linux and X.
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</P
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><DIV
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CLASS="sect2"
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><H2
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CLASS="sect2"
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><A
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NAME="AEN3014"
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></A
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>12.21.1. Smart Battery Support</H2
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><P
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> The
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<A
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HREF="https://sourceforge.net/projects/sbs-linux/"
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TARGET="_top"
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>sbsutils</A
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>
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package is a set of utilities programs to handle the Smart Battery
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on laptops, it offers Linux kernel & ACPI support for the Smart Battery System
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found in some laptop computers.
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</P
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></DIV
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><DIV
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CLASS="sect2"
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><H2
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CLASS="sect2"
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><A
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NAME="AEN3018"
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></A
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>12.21.2. How to Improve Battery Uptime</H2
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><P
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> These are the most important factors which have influence on the battery
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uptime. Please see the appropriate chapters for power saving tips:
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</P
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><P
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></P
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><UL
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><LI
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><P
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> <A
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HREF="mobile-guide-p2c1s1-cpu.html"
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>Section 12.3</A
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> CPU
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</P
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></LI
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><LI
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><P
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> fan
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</P
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></LI
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><LI
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><P
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> <A
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HREF="mobile-guide-p2c1s12-memory.html"
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>Section 12.22</A
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> memory
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</P
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></LI
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><LI
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><P
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> <A
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HREF="mobile-guide-p2c1s4-graphic-chip.html"
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>Section 12.6</A
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>graphics card
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</P
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></LI
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><LI
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><P
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> <A
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HREF="mobile-guide-p2c1s23-harddisk.html"
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>Section 12.33</A
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> hard disk drive
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</P
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></LI
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><LI
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><P
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> <A
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HREF="mobile-guide-p2c1s21-cd-drive.html"
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>Section 12.32</A
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> optical drive
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</P
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></LI
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></UL
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><P
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> Getting your computer to use the least amount of power can be problematic.
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Intel's
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<A
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HREF="http://www.linuxpowertop.org/index.php"
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TARGET="_top"
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>http://www.linuxpowertop.org/index.php</A
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> project provides information on reducing power usage, tips, and tricks for Intel-based computers running Linux.
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As a first step, Intel has released PowerTOP, a tool that helps you find what
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software is using the most power. By fixing (or closing) these applications or
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processes, you can immediately see the power savings in the tool. You'll also
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see the estimated time left for battery power if you are running a laptop. The
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Tips & Tricks page has fixes for a lot of the issues that are already found.
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</P
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></DIV
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></DIV
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><DIV
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CLASS="NAVFOOTER"
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><HR
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ALIGN="LEFT"
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WIDTH="100%"><TABLE
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SUMMARY="Footer navigation table"
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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><A
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HREF="mobile-guide-p2c1s10-pmu.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="index.html"
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ACCESSKEY="H"
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>Home</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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><A
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HREF="mobile-guide-p2c1s12-memory.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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>Power Management Unit - PMU (PowerBook)</TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="mobile-guide-p2c1-hardware-in-detail.html"
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ACCESSKEY="U"
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>Up</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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>Memory</TD
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></TR
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></TABLE
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></DIV
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></BODY
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> |