[core-utility]

That power bank serves a niche for me I've been searching a while for. I have a sound (white noise) machine I use for sleep, but it's pretty susceptible to brown outs or dirty power and that's pretty jarring. It's powered by USB, and I've never been able to find a UPS that meets:

- Small

- Cheap (I wouldn't consider $99 cheap, but it's better)

- Seamless switch between power and battery

I've thrown a small battery pack on before but the battery wouldn't charge and serve at the same time.

[HanClinto]

One of the commenters on the post was struggling with the same thing, and found a battery bank that advertises seamless switchover between charging and power -- the ZMI QB826/QB826G 25000mAh. Amazon it's around $160, Aliexpress is around $100.