This is a 2x CR2032 magnet light that HF has had on sale for $1 a bunch of times. I missed the sale, so splurged on one at the full retail price of $1.79, still not too bad, as I figured that at worst I could use the pair of 2032's. But my more interesting idea was adding a minimal headband and using it as a cheap lightweight headlamp. I think this is a borderline practical idea, but overall, meh.
Weight of this light is 28g of which a few grams is probably the magnet on the back. The magnet looks like it could be pried out easily. The beam is a wide and even flood, good for close-up illumination but probably useless for distance. Stated output is 30lm and I guess I can believe that, at least with fresh batteries. Two 2032 at 200mah each is 1.2WH which is comparable to a single AAA cell. UI is crap: press button for high, press again for low, once more for flashing, then finally off. You must cycle through all the modes to turn it off. Low is visible PWM but I'm not too bothered by that. Light source is 6 tiny leds on a COB strip.
The light is bulbous and bulkier than I'd prefer, but fine. Width is about 88mm not counting the keychain post, height 34mm, thickness 24mm. The battery cover is on the back, a circular plug with a coin slot. The light itself is in a shell of two halves that I guess are welded together. It might be possible to split the halves, then stick them back together with super glue or similar, but I haven't tried this yet. It might alternatively be possible to drill holes in the ends and thread some shock cord through the light without doing that disassembly. I might pop this light open to photograph the internals in order to check this possibility.
Anyway, another day, another crappy light. As a random utility light to toss in Mom's kitchen drawer in case of a power outage, it's nice because the lithium batteries have very long shelf life and are unlikely to corrode like alkalines. It's basically a smaller version of the 3AAA magnet light that HF used to regularly give away for free with a purchase, but which the now sell for a few bucks.
My rating: given what it is, 3 stars / 5.
Hardcore nerds use TeX but if I understand your question, you probably want LibreOffice. I'm unfamiliar with OnlyOffice so ok, maybe that's good too.