newbie questions he

Do internal SSD cards require a constant uninterrrupted supply of power
to maintain the data stored in it?

What about external SSD cards? I just saw an ad for a portable SSD
(Crucial 500GB X8 Portable SSD - Up to 1050 MB/s - USB 3.2 - USB-C,
USB-A - CT500X8SSD9) that jogged my questions.

If they do, how long can they go without power before the data is lost?

Thanks,

John