Charging your cell phone in the Tesla? Not only is it possible, it is even possible without a cable in all other models. Zat least if the inductive charging pad works. But cable or not, the power required comes from the battery and reduces the remaining range.
How much of an impact does this have in figures?
Charging a Tesla cell phone: Power consumption and range
The answer is: almost not at all. Let's take an iPhone 13 as an example, whose battery capacity is the equivalent of 12.41 watt hours.
Even if you want to charge your cell phone in the cheapest Tesla Model 3, you need just 0.02 % of its 62-kWh battery for a full charge, which corresponds to around 98 meters (!) of the specified 491-kilometer range.
For other Tesla models, the loss is even lower, at least compared to the battery size. So you can charge your smartphone in your car without any worries - and as soon as it's full again, you can also store it safely and neatly with a practical armrest organizer.