If the soil is dry enough to avoid liquefication, lifting should not happen. A ditch around the pool with drainage to lower ground at some distance would likely solve the problem even if the soil is problematic.
If the concrete is reinforced with rebar, it can withstand sideways load by the soil. If not, the issue of soil pressure would need closer consideration.
Disclaimer: I’m not an engineer
Unfortunately, yes.
I’ve had multipe experiences with seeing a flashlight battery which, according to labels, ought to have the capacity of an electric vehicle cell. And of course they don’t - on EBay or AliExpress, there’s a 100% chance that they’re just deceptively labeled. :)
If one needs high current, measuring the current with a known and low resistance (e.g. car headlight bulb) helps.