I was kinda wondering about that. If they can fit a charging circuit into a 18650, maybe they can put a switching voltage regulator circuit into a AAA li-ion? Amazon is full of lying products, so it’s totally possible it’s a planted review and just false. But I didn’t think a li-ion AAA battery was something that was out of the realm of what we can do technologically. It’s more supply chain and market conditions driving the availability of options right?