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2 months agoThere are DC UPSes that can supply 12V and are typically used to keep wireless routers and security cameras running for a few hours during power failures. They plug into the mains and are about the size of a 3.5" HDD.
Most USB power banks power cycle when the switch between charging/supplying/pass through mode, so if you use them for computer equipment they will lose power for a few seconds when the mains comes on or off.
Edit: DC UPSes are also much cheaper than standard ones.
Hi! That looks way more expensive though it might work for you. This is what I had in mind: https://www.amazon.ca/Battery-Uninterruptible-8000mAh-Circuit-Protecting/dp/B0F66B34WN