A friend had a cheap zoomie that this battery came with. He asked me if the battery was any good, so I popped it in the Lii 500 after a good laugh.
Zoomie was better than most, has a rotating ring to set the level of zoom, and clean white, not angry blue, but it didn’t have a brand name on it. Even had a built-in charger, but not USB, a tiny toothpick style plug with a dedicated transformer.

I recovered a set of 6 zero volt batteries for him from a laptop pull, and even though they were very old (I think 2010-2012) they recovered to 90% capacity and retained voltage for a week. So he’s happy. I asked if I could keep the Ultrofite as a curiosity.