[PLUG] [OT] UPS for a router

[Mayuresh]

Wonder whether there is such thing - a compact UPS that can be used to
power a router to ensure uninterrupted wifi connection for home usage.

Well I could buy a battery powered router itself. But I already have one
and I am not getting good performance and range from it. Hesitant to buy
yet another in this category.

Is there anything called a mini UPS or something. I need a compact form
factor for my requirement.

Also, for such requirement, where the end load is DC, inverter is a waste.
So is there anything like a "DC UPS" that can supply 9V DC that can be
directly connected to the router. It will be really good if such thing
exists.

Not much luck searching around on the web (particularly, the item should
be purchasable from a reliable source in India.)

Mayuresh.