I'm wondering if I could power a Kiwifoto dew strip that requires 5v2a...
No, you cannot. See here (v2 ASIAIR is a Raspberry Pi 4; version 1 was a Raspberry Pi 3B+):
https://www.raspberrypi.org/documentation/hardware/raspberrypi/power/README.md
Raspberry Pis come with self healing fuses.
Chen
