Precisely my point regarding Hansshow Power Frunk: Even in the event of a loss of 12V, all by my lonesome, I have immediate access to my emergency equipment. In addition to the Li-ion jumpstarter, I store a 1st aid kit, a tire repair kit&inflator, lug wrench, jack&pucks, paper towels, nitrile gloves, mobile charging cable with all the 240V adapters and a bottle of Invisible Glass in a ziplock bag. No sense in standing around waiting for someone else to respond, right?
As to your guess that aftermarket mods will void your warranty, if that happened due to a Power Frunk, I would speak with the SC Manager and cite Elon's own words to Sandy Monroe that their 'use of a 12V lead-acid battery is an inherent defect in their cars.' If that doesn't work, then I'd cite the Federal Magnuson-Moss Warranty Law. I suspect you'll get your free battery.
People always want to trott out magnuson-moss, but that doesnt help you if the part that fails could have been caused by something you did. An aftermarket frunk kit drawing power from the 12V "could" cause the battery to fail, so magnuson-moss will not help you in the slightest there.
Magnuson-moss says that they cant say "we are not going to cover this defect in your glass because you have a 12v aftermarket kit connected to your battery" (for example). Glass is not related to the 12v in any way, so magnuson-moss protects you. The frunk kit (or anything else) connected to 12v could cause the 12v battery to fail, so it doesnt protect you at all in that regard.