I have found a few old Kickstart projects, such as this, which consist of a case (not on-topic), containing a Real Time Clock and battery power for the Pi.
Some have a few extra features, such as a display, extra USB ports, or solar power panel, etc.
Does anyone know of anything with at least the capabilities of the referenced project? (or even where I can buy one of those)
autoaccessori-onlinehas many. Again, with RTC, but not battery – Mawg says reinstate Monica Nov 18 '18 at 19:54