Router Battery Backup

My daughter wants to plug a 12v battery into her 9v router. Will it fry?
Thats a bit more than a 10% tolerance would allow, if the device doesnt explicitly give a variable input voltage it would go pewpew
 
Thats a bit more than a 10% tolerance would allow, if the device doesnt explicitly give a variable input voltage it would go pewpew
Thanks very much, she won't listen to me but I'll show her your post :D:D
Some routers are tolerant of higher voltages but the rule of thumb is to stick to the rated voltage. I wouldn't chance it.

Her best bet would be to get what's called a buck converter to step down the 12V to 9V that the router would accept. Some soldering may be required if she wants to follow this route as it's not a plug and play solution.
Thank you, I think she must just buy the right thing instead of blowing us all up.

You guys might have convinced her :thumbsup:
 
:confused: SABC? No, man. Netflix and chill. My router is on a Ratel, that I bought 2 years ago. Just need power for the TV and Chromecast.
:ROFL: I was kidding, it was my way of saying I was concerned there was no mention of other stuff like routers and media players, forgot the tv could be smart and have apps. Play around with the screen brightness, that also has a big effect on power consumption.
 
Well,generally the POE on these small units are meant for "Passive" 12-24v rather than "Active" 48V

Yip, the Ratel 860P has 15VDC and 24VDC passive PoE which won't work for 802.3af PDs which are 48VDC.
What I did yesterday is I wire up a DC-DC boost converter to boost the 12VDC output on my Ratel to 48VDC which I feed into a 48V TP-Link 802.3af PoE injector.
This powers my Ubiquiti Unifi Pro access point which only runs on 48V 802.3af/at.

The DC-DC boost converter I used.

The 1Gbps TP-Link 802.3af PoE injector I used.

I previously bought another DC-DC boost converter and although the specs said the output could be adjusted up to 52VDC it turned out the max was 40VDC regardless on the input voltages I tried. Chinese specs ...
 
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The 1Gbps TP-Link 802.3af PoE injector I used.
stupid question but never been too sure about those POE injectors....
i want to replace my current router with a router that doesn't have POE.
will this add the poe functionality to my router and i will be able to power it on using the ratel 860?
 
stupid question but never been too sure about those POE injectors....
i want to replace my current router with a router that doesn't have POE.
will this add the poe functionality to my router and i will be able to power it on using the ratel 860?
If your router doesn't support POE then you can't use POE to power it.
 
stupid question but never been too sure about those POE injectors....
i want to replace my current router with a router that doesn't have POE.
will this add the poe functionality to my router and i will be able to power it on using the ratel 860?
You will still be able to power it with the ratel, just not from the POE port.
 
You will still be able to power it with the ratel, just not from the POE port.

I power my Huawei ONT in another room from the Ratel using a passive PoE injector and splitter cable set.

Like this:

Or this:

I orginally planned to use the PoE injector built into the Ratel but the 15V PoE output is actually a bit higher than 16V and 16V is a common voltage limit for things like electrolytic capacitors used in power circuits.
The Huawei HG8240H max input voltage is 11V to 14V. It may have worked for a while until something like an electrolytic capacitor or other component dies from continually being over stressed so I decided to rather play it safe and use a injector/splitter set and run on 12V.
 
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So after the recent bout of load shedding this weekend I'm very happy that the Ratel 860P is living up to it's specs.
I run 4 devices off it and it drops to 50% capacity after two hours.

I'm powering:
1 x Huawei HG8240H (fibre ONT)
1 x D-Link DSL-225 router (for it's 4 port switch and PPPoE capabilities via WAN port)
1 x Intel NUC DN2820FYKH (2TB NAS server, Plex server and other Linux stuff)
1x Ubiquiti Unifi AC Pro access point (powered by 12 to 48V boost converter and 1Gbps 802.3af injector)

I'm not sure if it would make 4 hours but I don't live in JHB and 4.5 hour slots of load shedding only starts at stage 6+ so should be fine. If it gets that bad I'll run the generator a bit.
 
Where do you guys get extra cables for the Ratel? Router is 9v, CPE is 12v so the splitter cable won't work.

Been struggling to get a cable for CPE without ordering online from Communica or R S.

Just to say I'm not techie and don't understand most of what you say in this thread - just need a couple of DC 5.5 x 2.1 cables.

P.S. can't make one up because I don't even know what reverse polarity means so I'm sure to do it :(
 
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Just to say I'm not techie and don't understand most of what you say in this thread - just need a couple of DC 5.5 x 2.1 cables.
You want 2.5mm instead of 2.1mm on the Ratel side.
 
So after the recent bout of load shedding this weekend I'm very happy that the Ratel 860P is living up to it's specs.
I run 4 devices off it and it drops to 50% capacity after two hours.

I'm powering:
1 x Huawei HG8240H (fibre ONT)
1 x D-Link DSL-225 router (for it's 4 port switch and PPPoE capabilities via WAN port)
1 x Intel NUC DN2820FYKH (2TB NAS server, Plex server and other Linux stuff)
1x Ubiquiti Unifi AC Pro access point (powered by 12 to 48V boost converter and 1Gbps 802.3af injector)

I'm not sure if it would make 4 hours but I don't live in JHB and 4.5 hour slots of load shedding only starts at stage 6+ so should be fine. If it gets that bad I'll run the generator a bit.
nice to see the 860p can handle a nuc....i am getting my new AMD nuc i the next few days , going to move my plex and vms there and connect it to the ratel.
 

Thanks for this ginggs, EXACTLY what I need, will get a few of those.

The Ratel has several 12v ports :love:
 
So after the recent bout of load shedding this weekend I'm very happy that the Ratel 860P is living up to it's specs.
I run 4 devices off it and it drops to 50% capacity after two hours.

I'm powering:
1 x Huawei HG8240H (fibre ONT)
1 x D-Link DSL-225 router (for it's 4 port switch and PPPoE capabilities via WAN port)
1 x Intel NUC DN2820FYKH (2TB NAS server, Plex server and other Linux stuff)
1x Ubiquiti Unifi AC Pro access point (powered by 12 to 48V boost converter and 1Gbps 802.3af injector)

I'm not sure if it would make 4 hours but I don't live in JHB and 4.5 hour slots of load shedding only starts at stage 6+ so should be fine. If it gets that bad I'll run the generator a bit.
Which port do you power the nuc from?
 
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