ok? If it dies after 10 minutes and then lets you use a select number of compatible smartcards for another 5, that's not quite the level I think people are talking about here

If running out of power is super critical carrying a power pack is just as simple as replacement battery. It also more generally useful as it can charge lots devices other then phones.

https://www.bestbuy.com/site/external-battery-packs/usb-c-po...