Not just for routers - these handy little inline modules could be used in many applications where it's beneficial to reboot a piece of equipment from time to time by cycling its power.
What immediately comes to mind is a remote system used for monitoring equipment status, where it would be annoying to travel to the location to do a physical reboot.
In a control panel something similar could be achieved with a time switch or asymmetric recycling timer module. Noting that for high power motor loads and compressors, a delay before repowering would be useful.
because of the time scale involved I didn't check the actual timing of these units. I also don't know how much gradual drift there will be with the reset time, so it could theoretically drift into a period when the router is in heavy use. Easy to reset to a quieter time though.
Ironically, the simpler power circuitry of the rectangular router may actually help it survive a reverse polarity incident.
Here are some links to the items on AliExpress (not a sponsor).
These are affiliate links, but that will not affect the price you pay.
The simpler rectangular "24 hour" version:-
https://s.click.aliexpress.com/e/_c3IJm7Ez
The more complex round "72 hour" version:-
https://s.click.aliexpress.com/e/_c3fJKzql
If you enjoy my videos and would like to support me with a dollar or two for coffee, cookies and gadgets to take apart, you can do so by supporting me on Patreon. I release videos without adverts for critique and feedback on Patreon as soon as they have been made. I also release Patreon-only backstage videos when I'm working on shows.
https://www.patreon.com/bigclive
Alternatively, for a single coffee contribution you can use PayPal:-
https://www.paypal.com/paypalme/bigclive
#ElectronicsCreators
...
https://www.youtube.com/watch?v=EUBsKdxW9wc