Kevin Karhan :verified:<p><span class="h-card" translate="no"><a href="https://hachyderm.io/@danderson" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>danderson</span></a></span> personally, I prefer to go with either 48V, 20V, 12V or 5V in DC application depending on what's convenient.</p><p>The 7,9x5,5mm ThinkPad barrel jack can do up to 11,5A originally, giving you 230W at the plug end.</p><ul><li>Pretty shure they did standardize it for 16A given all classic thinkPads used it except the very old ones.</li></ul><p>That being said <a href="https://infosec.space/tags/USB" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>USB</span></a>-C-<a href="https://infosec.space/tags/PowerDelivery" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>PowerDelivery</span></a> rocks and there are off-the-shelf ICs and boards to negotiate a ceetain voltage/amperage for any needs.</p><ul><li>Second best is <a href="https://infosec.space/tags/PoE" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>PoE</span></a>++ 802.3bt Type 4 which is ~ 60V and gets you 100W and at least 87W at the device end.</li></ul>