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authorBradley Taunt <bt@btxx.org>2024-06-06 08:05:12 -0400
committerBradley Taunt <bt@btxx.org>2024-06-06 08:05:12 -0400
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+<h1>Improving Laptop Battery Performance on OpenBSD</h1>
+<p>2023-06-13</p>
+<p>It is no secret that OpenBSD has poor battery performance on laptops. Although not as impressive as something like Alpine Linux or FreeBSD, you can tweak OpenBSD <em>just enough</em> to squeeze more life out of your machine's battery.</p>
+<h2>Our New Best Friend: <code>ampd</code></h2>
+<p>I won't go into great detail about <code>ampd</code> here - that's what the incredible <a href="https://man.openbsd.org/apmd">documentation is for</a>. You'll want to make sure to start it before trying to configure it:</p>
+<pre><code>doas rcctl start apmd
+</code></pre>
+<p>If already running in a live session, you can default to <code>-A</code> (auto) but I suggest setting cpu performance to low:</p>
+<pre><code>apm -L
+</code></pre>
+<p>To make these changes permanent on boot:</p>
+<pre><code>doas rcctl set apmd flags -L
+</code></pre>
+<p>Optimizating battery life via <code>ampd</code> will have the most noticable impact but you can improve things even further by implementing some extra "small" performance wins.</p>
+<h2>Small Performance Wins</h2>
+<ol>
+<li>Reduce your screen's brightness (<code>xbacklight -set 50</code>)</li>
+<li>Use a lightweight window manager instead of a beefer desktop environment</li>
+<li>Enable battery saving options in your system BIOS (if available)</li>
+<li>Disable the fingerprint scanner and bluetooth in your system BIOS (if available)</li>
+<li>Use utilities such as <code>mpv</code> and <code>ffmpeg</code> for media consumption</li>
+<li>Reduce the number of open applications at any given time</li>
+</ol>
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