Stay online with a powerbank UPS

[@bunch8]

If you guys are thinking of doing this be sure to get a power bank that Explicitly says Pass-Through Charging as the author of this video states. Most of the cheap USB powerbanks on eBay, Amazon, etc. do not have this feature because it requires more components to make and is more expensive. This is important because what the cheap ones do is always take power from the battery even when the powerbank is plugged in for charging. This means the battery is continuously being discharged and charged which will wear out the battery prematurely. Thanks for posting this video & Happy New Year !

[@deividaspaulauskas2751]

Most of expensive ones does not allow Pass Through either as they claim it destroys your power bank quicker due to recharging cycles.

[@day_dreamer_dan]

Yes had a similar question for the uploader. I have a Lenovo pa10400 power bank and I am able to charge and discharge it simultaneously. However I want to be sure if it is actually pass through charger or is it just taking power from the battery and powering the router and then the power bank charging it self when the battery drops below 100. Pass through charging should simply connect the power input to the out of the power bank unit if the power bank itself is fully charged. If this doesn't happen then it will simply keep consuming battery cycles of the power bank as it will keep charging as soon as it drops below 100.

[@Raphael2034]

I'd like how he make simplified things especially this one that relates to UPS for wireless router. Not that I'm against those that made their own "mini UPS" say using lithium-ion with BMS but this one right here is practically easy to follow and cost-effective too. Cheers Gadget Addict

[@davidofug]

Almost 4 years and I found this to be a comprehensive video. I will try this thank you.

[@GadgetAddict]

Something I forgot to mention is that ideally you want to use a USB cable with thick wires inside. If the wires aren't so thick, make the cable shorter.

[@59977012]

Gadget Addict Great video 🖒🖒🖒🖒🖒. What Powerbank do you reccomend as I'm using a PLDT Fibr Modem DC 12V/2A? After watching I tried it but it's not working. I am using Royqueen Powerbank 20,000 Mah and it's working charging my phone the same time charging my powerbank.

[@Sip96]

Gadget Addict hey i was able to power up my modem with this method at full bar for the first time but suddenly my modem's indicator shows 1 bar only....looks like it doesn't have sufficient power 😅...what should I do? I'm using YES Zoom 4g (input : 12v, 1.5A)

[@jeorlieedang2928]

does power loss a lot if your cable is too long? like half a meter?

[@marcoajon564]

@@59977012 have you had a solution with a modem with 12V/2A also tried it and its not working. I saw someone using 2 powerbanks, but i haven't tried it yet

[@vinzkarl6291]

i think its not working cause the modem is 12V 1.5A-2A.. and the powerbank is only 5V .. i think the usb cable its produce 12V output.. and not 5V

[@GowrishankarLeGrand]

This man has a lot of power banks!

[@mdrejhon]

A new (2020+) version of this trick is to use a USB-C PD power bank with passthrough charging, combined with a "PD emulator" or "PD decoy" adaptor, to create custom voltages (e.g. 9V or 15V or 20V) at high power (e.g. up to 100 watts). This can power some more beefy electronics!

[@olukolatimidavid8318]

This is a lot of electronics stuff i don't understand. Can you please specify which devices exactly to buy and recommendations, also maybe how to set it up, thanks

[@chrislamp]

@@olukolatimidavid8318 I know I am late but, what this user wanted to say is that: 1)Nowadays most phones to charge quickly, they require larger amounts of power. So, what companies did was, they made it so that devices can receive and transmit more power through usb. Usually, the standard for usb is 5v 1a, but most phones can accept 12v 1.5a or more through usb. Coincidentally, that's the voltage most routers/modems run on. 2)Thus, most smartphone chargers and powerbanks have to communicate with the phone to agree on what voltage is acceptable. If you look at the specs on your phone charger/powerbank, you will see that it might say that it outputs a wide range/variety of voltages. 3)So, what some smart people have done is, they took the little chip that makes the agreement between the phone and the charger, they put it on a small board that can accept usb input and output with various other ways (ie usb, dc jack etc) and this way they managed to create their own ups out of a powerbank. You can usually find these boards really cheap on sites like aliexpress with various names (pd decoy, pd trigger, qc trigger etc). You can buy a board like this, find some old power brick that fits in your router's/modem's power jack, cut and strip the cable, wire it to the board's output (be careful with the polarity, the device you want to power (or the power brick of said device) should have an image that shows the polarity. Usually, red is positive and black is ground/negative), set it up to its correct voltage (the board should come with a manual. If not, consult the seller),connect your powerbank on the board and the other cable to your router/modem and boom you just made a ups for your router/modem. If you don't understand how this all works, I would suggest you consult a more electronically savvy person to help you build it.

[@akashabbi386]

excellent i was searching for this type of solution from last few months and was ending up with big UPS, but this compact and smart idea is very great, thanks alot dear

[@akhileshjj6381]

Works as mentioned.... Critically needed this during the lockdown time when i have to continuously work from home and internet used to go down during power fluctuation...Thanks..

[@day_dreamer_dan]

I see u have commented a year ago did u use this routinely? How was the experience? Below was concern about using this method I have a Lenovo pa10400 power bank and I am able to charge and discharge it simultaneously. However I want to be sure if it is actually pass through charger or is it just taking power from the battery and powering the router and then the power bank charging it self when the battery drops below 100. Pass through charging should simply connect the power input to the out of the power bank unit if the power bank itself is fully charged. If this doesn't happen then it will simply keep consuming battery cycles of the power bank as it will keep charging as soon as it drops below 100.

[@MrMekmek29]

I needed something like this to save me some money on keeping my router plugged in all the time.

[@ankitpal9761]

Use 12v ups battery

[@aek12]

@@ankitpal9761 It is very expensive

[@niranjanwagh5767]

Really great detailed video. But I still have a question. Is it safe to keep powerbank charging all the time ? Won't it create heating issue or degrade of battery ?

[@nonpolitical9976]

100% works. Thanks a lot bro making this video. Really useful 10 out of 10. Hats off to u❤️❤️❤️❤️❤️❤️❤️❤️

[@olukolatimidavid8318]

Hi please i need a recommendation of a pass through power bank, Which one are you using thanks.

[@abdelrahimhalawani4240]

thanks a lot you just saved me from paying 50$ , i was lucky i had this cable that you custom built it , first it did turn on with no internet connection , i tried your tip about using short cables and it worked !!! thanks a lot

[@mediacoregroupph]

I have a surplus of those Jack adapters from a rejected CCTV project. you are giving me ideas.

[@rafaelr6792]

Man,you just saved me soooo much money THANK YOU SO MUCH!!!!

[@sahilbakshi939]

yeah, true

[@nicholasndb2745]

This is a very good concept, but it doesn't always work. I tried this myself, and I didn't have much luck. 2 out of the 3 routers I tried failed to function. The first one I tried was my main modem/router combo, which didn't work. Then I tried my standard inexpensive Cisco router which also failed to function. The one that I got to work was an old Westwood modem/router combo from my old DSL connection. I checked and made sure the polarity was correct and I checked my multimeter to confirm my wiring was correct and it tested 5.1 volts positive on inside and negative outside of the barrel connector. I tried a couple different power banks too but the results were the same. If anyone wants to try this, I definitely recommend that you do NOT cut up your main wire, but instead buy that terminal he used in the video, or cut up an old one that you don't use anymore, because there is no guarantee that this will work for you.

[@GadgetAddict]

What's the maximum output of your powerbank, 1A or 2A? Did you use a good quality USB cable with thick power wires inside? What were the power ratings on the 2 devices it didn't work with? And yes, cutting up an old unused cable would be better than cutting up your current one. Most people have an old power supply in a draw that has a matching DC barrel connector.

[@nicholasndb2745]

Gadget Addict The power banks I tried were up to 2.4 amps, I tried the 1 amp port and the 2.4 amp port. The first All were 12 volt requirement and the 1st one had a 1.5 amp input and the other 2 had roughly 1amp input, one of the 1 amp ones did work

[@ishelton750]

Dude's got enough battery's to power a city 😭😂😂😂

[@swatantra0815]

Had a question about the power bank ups suggested by you. Is it a good idea to have this as a permanent solution? What are the chances of fire, due to continued charging of the power bank and the router? Have you used it for a long time and found any pointers that you can share. Thanks

[@mavirek]

Brilliant! So these smaller power bricks have DC outputs, which is why you were cautioning us to check the voltage? And that's why you had to change the power cord to your modem/router to a USB to DC one, right? But I found ready made ones on Amazon, like this 3.28ft USB 5V to DC 12V Converter Step Up Voltage Converter Power Cable,for Camera, Desk lamp, Speakers, Blue Tooth Headset, and Other 5V Devices.(5.5 x 2.1mm). Wouldn't this do alright, provided 5V to 12V is what was needed? They had other similar cables and end pieces to fit any size DC. One last question: If I just used my Bluetti EB3A power station with UPS, and plugged into the AC outlet on it, I would accomplish the same thing, right? (Just not as inexpensively and cleverly as you.)

[@realcartoongirl]

there are usb converters thingys that you can buy that goes from usb 5v to the 12v barrel connector, it increases the voltage

[@realcartoongirl]

idot

[@AmanAman-bg8bl]

Mat, you are just bloody easier then every one. Thank you

[@tubeDude48]

How about a link to buy the Moyou.

[@ecgm19]

been doing this for almost 2yrs. and it really works on my globe/prolink router

[@GadgetAddict]

Thanks for sharing that :) I've had it going for just a couple of days but the principle is solid so I'm not surprised to hear it going for years :)

[@ecgm19]

Gadget Addict i have 5 power bank, i use 1 dedicated to my router

[@ecgm19]

john doe YOOBAO 10000MAH, napansin ko pag asus or mi powerbank gamit ko di stable ung internet

[@meareAaron]

thanks for the vid man was planning to buy a 5 to 12v step up cable then i came across your vid and my lte wifi modem worked fine thenks a lot :) real helpfull keep up the good work :)

[@srinivasareddy8584]

Hello, Very interesting idea/solution. One question to check, which Powerbank do you suggest? 10000 mAh Li-Polymer is okay? And is there any risk using it as permanent option? I mean if we connect it between power source and router for longer times? Please clarify. Thanks again for you nice video...

[@saviom8166]

I have a question. When the powerbank is fully charged and it is still connected to the charger that is charging it, and the router is connected to the powerbank and switched on - in this scenario, does the router then end up drawing power from the current flowing in from the charger directly, and the battery in the powerbank is, well, inactive or something?

[@alron20]

you always have the nicest gadget (referring to usb watt meter 'cause I've been looking for a decent one for a long time) anw. where did you get or what do you exactly call that round adaptor? I'm definitely going to make this project. thanks for sharing this.

[@GadgetAddict]

You can find the little connector by searching 'DC Barrel Jack terminal'. I can't remember where that specific watt meter came from. I think it's from eBay. The portapow advanced meter is still my fave.

[@bicksckr]

Hey GA! will you make a video on how you make the cord?

[@GadgetAddict]

Mmm I dunno if I can show more than what's in this video. Cut off the end of a USB cable and connect the red wire to the positive and the black wire to the negative of the DC jack. At least if you need a center positive cable like what I showed in this video :)

[@marek2630]

I also suggest you that If your device is not working properly with 5V, try to find a step-up converter and set the voltage that your device needs.

[@heapsofttech]

Can you confirm if all power banks that support pass though provide uninterrupted supply when main goes off ? Can you recommend brands which are uninterrupted regardless of power status changes ? I have 2 power banks xiaomi and another brand both interrupt output when main power status changes

[@olukolatimidavid8318]

Hi, 4 years later I believe you've gotten a good product. Please i need recommendation from you as i want purchase a powerbank too

[@iofirag]

Notice: for illustrate real ups functionality you should look for a powerbank that keeps discharging when in use. (some of them do "power reset" for 1 second when the main power stop charge the powerbank)

[@day_dreamer_dan]

I think your video is awesome. I have a Lenovo pa10400 power bank and I am able to charge and discharge it simultaneously. However I want to be sure if it is actually pass through charger or is it just taking power from the battery and powering the router and then the power bank charging it self when the battery drops below 100. Pass through charging should simply connect the power input to the out of the power bank unit if the power bank itself is fully charged. If this doesn't happen then it will simply keep consuming battery cycles of the power bank as it will keep charging as soon as it drops below 100. Would like your views on this.

[@Megacooltommydee]

Was this shot in the Philippines? PLDT is a local ISP there.

[@davidc_ac9377]

long term review, did the battery pack last long? I think most of them uses the battery if the charging is not strong enough.

[@makerjason1034]

Cool video to show off your power bank and router collection. Nice idea. I have my router on a UPS and the lead acid battery seems to be dead now so would need this alternative.

[@elihaimov]

Won't this damage the router in the long run? also If it requires a certain amount of power then with lower voltage the ampage will go up, won't that potentially burn the tiny USB wires?

[@sanjaypatil3097]

no it will not damage your router has electric circute which prevent over volt and ampere and supply what router want

[@PandaSA2011]

I have a Mini DC UPS. But the manual is clearly translated from another language and not very helpful. 1) Do I leave the Mini DC UPS plugged in with its power cable? 2) Do I keep the Mini DC UPS powered on at all times? Struggling with constant loadshedding.4

[@WulfEyes771]

hello, nice informative video. :) I would also like to know if its bad for powerbank to use passtrough to power a device 24/7 ?

[@karzygijose]

Wouldn't the constant charging destroy the power bank since it has 500 charge cycles or does the USB wall charge does a trickle charge? Also how would one look for a pass trough charging I have a idea or a solar panel that charges a power bank that charges a rechargeable light

[@GadgetAddict]

It depends on your powerbank. Some support pass through charging where the power from your AC supply bypasses the battery cells and goes straight into whatever you have connected to the powerbank. Of course it will still need to trickle charge the cells now and then to keep them topped up. The specs listed on the sales page usually indicate if this is possible.

[@karzygijose]

Gadget Addict so pretty much the 500 charge cycles won't be affected? Or the life span of a power bank doing this for a "fail safe" in case of power outage?

[@GadgetAddict]

A charge cycle is a full discharge and recharge. Most of the time it will stay trickle charged from the AC. Provided you buy an appropriate powerbank, there should be no longevity issue.

[@karzygijose]

Gadget Addict hmmm now to find a cheap pass trough charging power bank

Hi. Nice video. Is there any way (or any circuit) to make a 'by-pass thing' to avoid the powerbank to function 24/7 and only work when power is off?.

[@narasimharao1206]

Yeah same question here!! good video though

[@kentofficial62]

This opens my mind to a whole new level :D thanks for this info man appreciated it

[@Samir_Hussein]

I have power bank, Which is better for Fiber Optic router 12v or 24v power supply ❓

[@akhan999]

Are there any safety issues here? Ie. Leaving it plugged in with pass through on charge?

[@angelomarmol8431]

how durable do you think is the cable? and also this trick could save my life. power outages are also very common here in tondo. anyways Awesome life saving video!

[@GadgetAddict]

Unless you plan to swing your router above your head like a lasso, I think it's more than durable enough :) I'm glad it's helpful for you! :)

[@angelomarmol8431]

Gadget Addict Lol. thanks!

[@swollendoggo2529]

*Is there a way to know if a power bank support pass through power?*

[@jeorlieedang2928]

hi, does all moyou brand supports pass through power? What model did you used on this video? Is it safe to plug it 24/7? I would like to use this to power my raspberry pi. Hope you can give me some insight.

[@donnatrump1403]

Phone line usually dead too 😔

[@GadgetAddict]

Really? I've never experienced that. The telcos are required to have UPS and generators to keep those going.

[@techtag9170]

Need ur help please man 🙏 Here is the problem All the internet system has to power adapters one says 9v - 500mA for router The other is 18v - 660mA for the internet dish i switched them and they work just fine but i want to power it from a bower bank i got two 9volt usb cables the dish led looks so dim so is it that there isn't enough power but why switching adpters works good

[@JimboJamboYT]

for fibre routers and ONT you can get 2 USB to DC cables with a step up power module to convert the USB 5v to a proper 12v 2.1A input. Li-on power banks are cheaper than ever, I can buy a 60 000mah power bank with multiple USB and USB-C ports with passthrough charging and fast charge capabilities for about $65. In countries like mine where we lose power from 2 to 4hrs at a time multiple times a day this works wonders and is cheaper than router UPS options with a lot less capacity.

[@rendermangl]

Brilliant. Thank you so much for this. Simple and effective.

[@greenman360]

Cool idea and you don't have to butcher a USB cable or fiddle with an adapter at all. They make USB to DC cables, I actually bought one recently so I could charge my hand vacuum in my car with USB.

[@farrukhzaidi]

Hi, I want to use your router/powerbank trick but I dont know how to check the polarity so that I can connect the right wires. I only have a clamp meter 266 and I have already severed the wire of the adapter. Can you help me identify which is the load wire and which one is earth/neutral?

[@JohnWilson-cn2ru]

This is very clever Gadget Addict.Can one buy a 12v/usb cable or is it a diy cable only?TIA

[@GadgetAddict]

I'm glad you like it :) You can find a pre-made cable on Amazon and eBay by searching '2.1mm USB cable'. Here's an example on Amazon UK - www.amazon.co.uk/GA/dp/B00SCBAE00

[@JohnWilson-cn2ru]

Awesome,thanks for the info.

[@tabineshhtc]

I think it works with only below 12v 1a routers not new 5g/AC dual band 12v 2a routers

[@GadgetAddict]

Yeah for higher power routers use a usb step-up cable to get 12V output. Or better, use a powerbank with Qualcomm quick charge and buy a 12V trigger cable.

[@rehaankhan1260]

How does it work in the long term? Does it affect the functionalities of the router in, say, a few months or a year? I mean there must be a reason the routers say 12 V, isn't it?

[@hypoloner]

Hello. If my internet connection has no bundled telephone, I will not be able to use this trick? I am using skycable broadband internet. What are my options? I hope you can help me

[@RUS-dv5sm]

there must be a reason why these routers are rated as 12V and not 5V have you tried this method with a router using all the Lan ports?

[@jeffjularbal9404]

Power rating of my Router is 12V - 2.5 A. Question is can i plug it to a USB with an output of 12V but only 1.5A? Thanks.

[@Ahmed-fs8bd]

Hi the router uses 12v the power bank can only supply 5v wont this make my connection or internet slower

[@opticalip1]

undervolting long term could potentially cause damage, not to mention on the router it may not be able to supply enough power to fully power the WiFi antena's. Would not recommend unless you have a small area for WiFi or using cat5 only.

[@MrCarburettor]

Great video, Thank You!! One question: Is there an easy way to spot this passthrough charge capable power banks? I've checked a few, I could not see this listed as a feature yet... I'll keep lookin..

[@Mostlycars888]

I have a 12v Huawei Fibre router with a USB to DC cable running from my powerbank, but it does NOT work like in your video. Any suggestions???

[@pault6533]

When you undervolt a device it may try to use the same power, which is current times voltage. As a result, there might be 2 or 3 times the current going through the wires with 5V compared to 12V. Would be good to make sure the connectors and wires are good to go for higher amperage.

[@ruthy1990]

Isn't it dangerous to keep the power bank charging?🤔 Please enlighten me.

[@ruthy1990]

Rather, how would I know that the power bank supports pass through power?

[@ingonyama-giveitatry4966]

Is a 10000ma enough for 2hr on fibre and router?

[@JohnDoe-uk6yf]

awesome Tip mate , Thanks for sharing this Knowledge

[@barbraevergreen]

This is a life saver. Thank your for this.

[@noelcleofas3619]

So, can this be used as a long term solution? If any, what component of the setup needs replacing?

[@prachandtripathi2112]

Does this affect the speed of the internet

[@praveenandhavarapu]

how much time does a 10000mAh powerbank can give backup

[@vismak]

Thank you man !!! Detailed ,very good

[@alhnashy2zz]

Works but only the modem turned on but it won't connect to the ips provider i think 5v is not enough to connect to the internet

[@meditationretreatswithagyat]

I have two devices (Router and modem) how to use both of them on a power bank?

[@mfanafuthimsimanga7045]

I bought a step up cable 5v to 12v,1A isn't working on my Huawei b315 LTE router

[@matthewlecsem]

How do i know if a powerbank supports pass through charging? Planning to do this. I'll most likely purchase from cdr king or miniso. Love your vids. Ta!

[@rsasidera]

What i observe about this method is it might work 50/50. Imagine you have 12v light bulb powering 5v only. Youll never get that bright power output of 12v so there is a performance lost here. In this case using 5v only in 12v gadget. Yes led will work cause it uses low voltage but some components in board might not work properly. It doesnt mean led light up at 5v will perform 100% of system. Like what i said in some gadget this might work. Good review.

[@GadgetAddict]

Thankfully most budget routers provided by ISPs are dropping the voltage down to 3.3V for the internals. So the 5V works fine. But you're right, it wont work for every modem/router and some do require the higher voltage :)

[@dorothyjoytapang6006]

There is 2 units, 1 router and 1 for wifi. Do I need 2 usb cord to connect it with my powerbank?

[@JamAdventures05]

What is that adapter called? I'm planning to buy one.. do you think Ace hardware have those?

[@asimbangash1986]

Is there no problem with voltage? I mean the power bank is about 4 to 5 volt but router is 12.

[@JAG_UAR]

sir my problem is , i have to make a ups using power bank... i just used 5v to 12v step up module.for my router. connected it with power bank and using router continuously. but the problem is i cant use the power bank while connected through power outlet... there is switching issue happens.. while powers off and power on.. time... approx 2 second.... how to prevent that power bank behavior? i am using mi powerbank

[@MOZARTF]

Hi Gadget Addict. Great idea! Simple, cheap and works. I would like to contribute to your idea, with the suggestion of using a power bank with quick charge 2 or 3 capabilities, and connecting a quick charge trigger module in the USB port of the power bank. With this setup, you can configure the voltage the power bank deliver, from 3 volts to 12 volts.

[@jeffjularbal9404]

Where I can buy this module?

[@jeorlieedang2928]

hi, I have a question. How many hours you think that powerbank can supply a router? 3 or 4 hours?

[@nikeboy69er]

Where did you buy that thing at the other end of the USB cable?

[@coolgrv9]

only tp-link and d-link routers are power hungry, they take 9v 600ma for running smoothly (in single power bank setup the lights were flickering and restarting continuously , --my router is tp link wrn841n-- ), i personally tested with 5v 2.1 amp (output) generic power bank for various router brands includes tenda, digisol, netgear etc all rated at 9v 600ma ,but they are working perfect with the single power bank setup. my query remains , will it work with a step up transformer from 5v to 12v circuit available at ebay . .?? any reply would be appriciable . .!! thanks

[@kae.hernandez]

Wow. How much mAh is that powerbank you're using?

[@prateeksrivastava2150]

tried this with Mi powerbank. On power outage, the powerbank stops for 1 second and then start powering my router - which is enough to reset the connection. Can help in this regard? I have Mi 10400 and it support pass through charging.

[@ricardocordoba]

How much time would a 10amp powerbank will keep the router going?

[@alisaif9529]

how mach must we charge the ups?

[@kathrynwhitby9799]

are you in a BT or Virgin Media isp country? would they be the same?

[@RehanKhan-zf8xs]

Does anyone have a link to buy the USB to router cable?

[@vivekgupta2587]

With 16000mAh power bank input 5V/2A, output 5V/2.1A and cable 2 meters long, the router boots up. But router keep rebooting once wifi is active. Is it because router is not getting enough power? How to fix this?

[@ingonyama-giveitatry4966]

Does it work for fibre?

[@9986038874]

I did try this idea with my binatone 9v modem, the power bank powers the modem. Only the PWR and the Wi-Fi LED glow. Neither the ADSL nor the internet LED glows. I also tried by keeping the USB cable shorter, the modem powers on but the internet doesn't come. Any kind of work around you would want to suggest such as using a power booster? If yes, then which is that instrument and how?

[@GadgetAddict]

There's the occasional modem that it won't work with. You can buy a boost converter on eBay which can increase the voltage to 9V. Have you tried a cable with thicker wires and a higher output USB charger/powerbank?

[@9986038874]

Thank you for your reply. I will try and will post back if further assistance is needed.

[@m4rckzer042]

Bright idea. But what if the powerbank has low mah and drain so fast

[@muhammadhaseeb2148]

Hi, copied your procedure, modem turns on but no wifi (12v/1a)

[@MaZEEZaM]

power outage only a couple of hours...where I am here in Australia, 18+ hours is pretty regular :(

[@jaxsonworkman4483]

Will the voltage and amperage increase at all when the router is actually running with the modem cable, transferring data to and from the web?

[@GadgetAddict]

Yes, under heavy traffic, you'll see the current usage increase. Although in my testing with the PLDT ADSL modem/router, when streaming KZbin, the extra power consumption was negligible.

[@kishorenv]

Really helpful video. I want to try this for my modem as well as cardless phone. What happens if i swap positive and negative by mistake? will it damage my modem or it simply does not boot until i connect it correctly? Please advise. I do not want to loose my modem.

[@GadgetAddict]

+Kishore if you get the polarity wrong, you could damage your modem.

[@wariszaman458]

i have tried this....i used powerbank to power my zte 12v router but the problem is that only the red power light comes on and it doesnt go any further...need help

[@MikeFoxtrot1]

Unfortunately doest work on BT Hub 5 router or their Openreach modem :( ordered a RAVPower 27000mAh power bank with built in 220V AC Outlet, hopefully that'll work but it's costing me £180 :/

[@GadgetAddict]

Did you try with a very short USB cable? I've found some routers only work with a 1-inch cable because of the voltage drop. And even then I had to use a cable with thick wires inside. Of course the other alternative is to buy a 5V to 12V USB cable which can be had for a few pounds and is generally much more reliable. The Rav will do the job, albeit at a higher price.

[@MikeFoxtrot1]

Gadget Addict I bought a USB 5v - 12v cable of Amazon, I tested the output with my multimeter and the outup was 12v but only 1.4 amps. Input 2.4 amps.

[@GadgetAddict]

Weird, those numbers don't quite add up. 12V at 1.4A is 17W and 5V 2.4A is 12W. And I'm amazed to hear your BT router is consuming that much power.. incredible.

[@MikeFoxtrot1]

Why does it not add up? The plug says 12V=1500mA, the router is meant to be 9.2W.

[@GadgetAddict]

You said the output was 12V 1.4A and the input was 5V 2.4A. So that's 12W input with a 17W output. Many routers state a certain power input but often use much less. For example the one supplied by my ISP claims 12V 1A which is 12W but it actually consumes 3-4W.

[@misterwilliam8877]

how long it work. I want to power up raspberry pi. if the battery fails, will it continue at least powering up pi through module