Makerfocus 3.7v 10,000mAh battery

The Heltec v3 ESP32 board is (allegedly) a very power-hungry board - "allegedly", because I haven't tested it myself, but I have read that it peaks at 250mW. Power usage is all relative, but for a device that I intend to be solar-powered, this is pretty power-hungry for such a small device. I want to make sure that my project has enough battery to last through a few cloudy days, when my small, 5v solar panel just won't contribute much. Which is what brings me to the Makerfocus 3.7v 10,000mAh battery; with some occasional aid from the power of the sun, this battery has plenty of juice to go around. I set up my ESP32 about a month ago, with a fully-charged battery, and a small, 5v solar panel. We've had an abundance of sun, but this battery hasn't dipped below 90% even once, which means that even without the sun, this battery will keep my project going for days.

I'm always concerned about the stability of a battery (Lithium Ion battery fires are not easy to put out) - especially a battery that I buy from Amazon, but this battery has shown (at least so far) to be plenty stable. I have it inside a waterproof project box, with minimal exposure to the sun to keep the temperature down, but the sun still hits it for several hours during the day. Even being outside and exposed to a bit of heat, this little battery hasn't shown any signs of malfeasance. I'm confident enough in it to even recommend it to others for their projects.

If you're interested in getting it, here's the link: https://amzn.to/3JfzrWJ Full transparency - this is an affiliate link, BUT I did buy the battery with my own money, and I'm not getting anything from Makerfocus to recommend it.