OK, but "fire" is right there, in the name.

95%+ of people would report “zero problems here, all concern is overblown”.

Safety doesn’t work that way?

I noticed a few months ago that the battery has started to significantly swell pushing the back panel apart, but I haven't worked up the motivation to try removing it yet. From what I can ascertain from user experiences, it actually does boot sans battery but haven't confirmed, it would be awesome if that worked and would probably give me 5+ more years of usage.

So in my case, data point is that 3 years of 24/7 use/charging of an old laptop/tablet was enough to push it over the edge and finally swell. It's really a shame how so many otherwise usable devices that could be wall mounted turn into e-waste because they won't run without a battery. With USB-C PD a well-designed device should be able to get whatever power is needed on demand but manufacturers don't really have any incentive to future proof for the .01% of users like me who would benefit.

Where things go off the rails is situations where extreme heat can be present (shoving phone in direct sunlight in window with hot climate is a bad move) another thing they don’t tolerate well and people don’t talk enough about this is deep discharging the batteries frequently. This causes a breakdown of the SEI membrane and makes it so future recharging generates more heat and gas. This will cause expansion and might cause a short/failure if poorly designed (galaxy note 7).

It worked as a stop-gap but I've since replaced it with a GL.Inet X300b ruggedized hotspot without any batteries.

There's no UPS for now... if I went the route of wanting uninterrupted power at the property I'd probably put a battery bank underground outside to power the entire building. It's not worth risking anything rechargeable inside the place given how hot it can get, and how long I sometimes go without visiting.

These mobile LiPo-using rechargeable devices simply aren't ideal for being left powered while unattended, day after day, year after year. All it takes are some sunny days with normally closed blinds left open and you may slowly be cooking that device you forgot about that Just Works but is a ticking time bomb after the 10th day it spent an hour in direct sunlight while charging.

AIUI the high temperatures are particularly damaging to the SEI (Solid Electrolyte Interface) layer, which is the layer preventing dendrite growth. If that layer breaks down enough for dendrites to grow, you're in internal short / fire-risk land.

Surprisingly they are, supervooc goes up to 120w now (which is insane), there is also a Motorola phone which also does 68w via PD standard

https://m.gsmarena.com/oneplus_15-review-2898p3.php

https://www.gsmarena.com/motorola_moto_g_stylus_5g_(2025)-13...

As for past through charging, it's actually apparently more common then I knew.

Google does it as part of their "adaptive" charging (hits 80% then does pass through) and the OnePlus etc also do it with a settings for gaming.

(Older article confirming this https://www.androidauthority.com/phones-with-bypass-charging...)