Bernie<p>After 41 minutes and 57 seconds of uptime, the firmware froze.</p><p>While I was unscrewing the case to press the reset button on the board, the display started fading.</p><p>That's not too surprising: the original lithium battery was outputting 2.7V (as opposed to 3V).</p><p>I'll go buy a new CR2016. The expected battery life for the <a href="https://mstdn.io/tags/SensorWatchPro" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SensorWatchPro</span></a> is 1 year, while the original <a href="https://mstdn.io/tags/Casio" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Casio</span></a> board typically lasts 7 years.</p>