<p><span class="h-card" translate="no"><a href="https://infosec.exchange/@0xabad1dea" class="u-url mention">@<span>0xabad1dea</span></a></span> (the first step the majority of modern devices, certainly the more expensive ones like phones--the ones you'd care about being fried--do with the power they receive is feed it into a DC-DC converter lowering whatever voltage it is to the 4.2V used to charge the battery*. as long as it's within the converter's maximum ratings, it's fine**.</p>