I'm thinking about adding a simple page to start with very little documentation about mini UPS. I have tested just 2 of them so I have not much practical info myself, but can be interesting if people contribute their own along the time.
Because this appart from possible little theorical info about mAh voltage, perhaps connector types, is going to be more a specific models about UPS and batts I prefer to ask before.
Can you clarify how this relates specifically to OpenWrt? Generally speaking, UPS (or mini) devices are not really a topic of discussion on the OpenWrt forums and wiki except insofar as they tie in with NUT or other UPS monitoring packages.
Of course.
Usually mini UPS doesn't have usb data connections and so like full featured UPS but anyway is not related with the idea here.
I just have the idea time ago but since the thread about OpenWrt One looks dead I recovered the idea. One thing that provide a UPS is surge protection, despite the power AC adapters should provide it too. Are options out of there that can be reviewed with router use case in mind. Can be contributions about for example ways to dim a particular mini UPS display and so.
Is not with the idea about getting a full featured wiki about UPS but a simple page with information that can be helpfully for OpenWrt use cases.
Perhaps the part I said about mAh and so have distracted from the main idea, but actually that is part of providing information about for example, my actual tests, for a E8450 despite the power adapter is a 12V 5A one, taking into account if you don't use the USB port, information about getting a UPS with lower power than the AC adapter can be useful to know for here.
Are you saying that you suggest on this proposed Wiki page - that a user could power their device with another power supply/UPS that has a rated amperage lower than the power supply provided by the OEM, so long as they don't use the USB port?
Maybe we have different ideas about the term "mini UPS", what I would define as such (small PCB with 1-4 18650 cells) might do a decent job at keeping your router up for a while, but I wouldn't expect anything from them in regards to surge protection or management features.
Or did you mean voltage?
Given that the discussion is basically about a small battery pack to power a router and not something that is integrated via software (NUT or otherwise), this feels rather off-topic. @slh - your thoughts?
If you lower amps or lower voltage, the power lowers and in the sentence I was meaning Amps, so is just Amps. Powering a device with a less amp power supply can make random power offs when the device ask for more power. When manufactures calculate the provided power supply take into account the max possible power with a margin. Actually in many routers just the avoiding the usb power makes that max attainable power to lower so much. So no, I'm not encouraging to use unsafe power options, but, you are true, giving a page like that with a section like that will make necesarry to trust a lot in the contributors.
Yeah, I'm with this, need to check the surge protection. From two I have tested even one is exactly a 4 18650 cells.
I don't think that was the point of the user's remark, but yes, that's a good idea as well (no need to involve the Wiki).
On a side note, some folks have started hardware discussion threads about powering devices with UPS, solar, replacement power supplies (and issues with them), etc. Feel free to search, and make an inquiry if there's something you feel merits dsicussion.
Well I think the wiki have space for exotic things like actually hw mod. Will check the things you say.
Agreed, battery, charging circuit, buck-boost converter, power-out - done. Nothing OpenWrt specific, no management, no power-low graceful shutdown magic. While those may still be very useful in some locations, it's 'just' an alternative power source.