Depending on the battery there are cheap AliExpress boards - or diy - to make tiny UPSes for a raspberry pi or other usb-powered device. I don't know for that specific battery; I have some that take 18650s, though.
One 18650 can get you several hours of runtime for a pi zero. The battery can cost more than the zero. The cheaper one cell UPS boards are about $2 (plus shipping).
An advantage of single cell UPSes is that you don't have to worry about balancing, which is a bit of a pain with scavenged cells.
One 18650 can get you several hours of runtime for a pi zero. The battery can cost more than the zero. The cheaper one cell UPS boards are about $2 (plus shipping).
An advantage of single cell UPSes is that you don't have to worry about balancing, which is a bit of a pain with scavenged cells.