Power bank, UPS, or portable power station?
The right backup for a phone may be very different from the right backup for a refrigerator or desktop computer.
USB power bank
For a compatible phone, light, or laptop, a power bank may cover the actual need with fewer conversion steps than an AC-based setup. Verify the required USB power-delivery profile, cable rating, and available Wh. A headline USB wattage describes output capability, not how many hours the bank can run a device.
Uninterruptible power supply
A UPS is a candidate when transfer continuity is central to the problem, such as keeping networking equipment on through a short interruption. Compare manufacturer runtime data at your load. The VA rating alone is not a battery-energy rating, and it cannot be substituted for Wh in the planner.
Portable power station
A power station can be useful for several plug-in loads that need stored energy over a longer interval. Check energy, continuous output, motor startup, and connection limits independently. Some models provide transfer functions, but compatibility and interruption time need verification for your equipment.
A mixed plan can make sense
You could assign phones to USB banks and leave AC capacity for a refrigerator. If you model only the AC battery in the planner, remove devices supplied by a separate battery so that energy is not counted twice. Keep each battery’s recharge and maintenance instructions with the plan.
Sources & further reading
Numerical examples and default device values are illustrative unless explicitly described as a measurement. Consult the manuals for your own equipment.
Make it a plan for your home.
Choose your devices and edit the assumptions.
Open the backup planner