Following up on the SE to close things out...
My first one lasted from January 2023 to May 2023 before I had to make a warranty claim due to water intrusion into the battery (red and blue flashing lights). It took a few weeks, but Aiper sent me a replacement unit that worked for a year and a few months before finally dying. No idea what it is this time - it's just dead with no indication lights at all and it didn't give me any warning signs that anything was wrong. I used it early last week and when I went to check it yesterday it was just dead.
Timely death, as I just received my Pentair Prowler 920 last Thursday (on sale on Amazon for $640 with free shipping and was on my doorstep 24 hours after ordering). I ran it with the pleated filters and it's amazing how much fine pollen and dust was in the bottom of my "clean" pool.
As it stands, my experiment with a cheap rechargeable pool cleaner is over. I'm chalking it up to a failure as the average lifespan of the two units was less than a year and while they performed okay, spending $200(+) every year doesn't justify the cordless convenience.