https://www.cnet.com/roadshow/news/elon-musk-tesla-party-camper-mode/

On Twitter today, Elon Musk promised that Tesla will add a "party and camper mode" to its Model 3, Model S and Model X. Per his tweet, the goal is to create a mode that lets you play music, power devices and keep the temperature pleasant for upwards of 48 hours. Two days straight? That's a lot of uppers, Elon. Better slow your roll.

As Musk notes, it's possible because many of Tesla's EV batteries permit 300-plus miles of use. But if you're not going far, you may as well put that juice to use without wasting a bunch of it on ancillary systems you won't be using. Hopefully, the mode allows for adjustments in case you don't really need the lights or the HVAC.