Router Battery Backup

Mirai said:
Are these BMS' reliable and rated? Is our understanding at this stage advanced enough or have these things been on the market long enough for us to have ironed out all the kinks? And is the QA good on these new no name companies. I could trust a BMS made by say Panasonic or Samsung but these no name brand ones?
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Okay, sorry, "low" risk. Keep buying dead acid then.
 
Mirai said:
Are these BMS' reliable and rated? Is our understanding at this stage advanced enough or have these things been on the market long enough for us to have ironed out all the kinks? And is the QA good on these new no name companies. I could trust a BMS made by say Panasonic or Samsung but these no name brand ones?
Click to expand...
Yes they are. If you have any doubt, speak to the manufacturer and do your own assessment, it's what I did with Hubble, and after having a conversation with Marius I am very convinced of the reliability and robustness of their BMSs, and their general technical expertise and competence.
 
RonSwanson said:
Yes they are. If you have any doubt, speak to the manufacturer and do your own assessment, it's what I did with Hubble, and after having a conversation with Marius I am very convinced of the reliability and robustness of their BMSs, and their general technical expertise and competence.
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He's talking about these alarm batteries:
1636793485052.png
 
wingnut771 said:
There is no risk. There is only a risk if there is no BMS and that is never the case, every lithium battery has a BMS.
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There is never "no risk", it is not possible for such a condition to exist, you can speak to any risk manager regardless of discipline. There is reduced risk, or risk mitigation, in the form of competent engineering, design that anticipates abuse (idiot-proofing), safety cut-off limits, quality control in manufacture, correct selection of components, informed use-cases and adherence to manufacturer's specifications when used.
 
RonSwanson said:
There is never "no risk", it is not possible for such a condition to exist, you can speak to any risk manager regardless of discipline. There is reduced risk, or risk mitigation, in the form of competent engineering, design that anticipates abuse (idiot-proofing), safety cut-off limits, quality control in manufacture, correct selection of components, informed use-cases and adherence to manufacturer's specifications when used.
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That's why I amended it to "low" risk.
 
RonSwanson said:
Yet he stated:
Click to expand...
I don't know, maybe I'm getting my wires crossed, there are a lot of threads.

Either way, the risk is introduced from heat which is created from using too much current which ends up melting the separation layers internally creating a short, or these "crystals" forming shorting the battery.

A lead acid charger doesn't come anywhere near over voltage or current needed to do this.
 
wingnut771 said:
I don't know, maybe I'm getting my wires crossed, there are a lot of threads.

Either way, the risk is introduced from heat which is created from using too much current which ends up melting the separation layers internally creating a short, or these "crystals" forming shorting the battery.

A lead acid charger doesn't come anywhere near over voltage or current needed to do this.
Click to expand...
Yes there are a lot of threads. :giggle:
Agreed that heat is a killer for lithium cells and lithium BMSs.
Lead acid come with their own set of safety risks, acid spillage, hydrogen gas and getting a hernia picking them up.
 
Mike Angelo said:
The router I'm using needs a 12 volt DC supply so it can work with a 12 volt battery. If the router uses another input voltage this won't work. I cut off a cable with it's connector from an old power supply and connect it to the battery making sure that the polarity is correct. The middle post on the round connector is normally positive but you need to make sure. You need a Multimeter to check the polarity and cable wiring. If you need a different DC voltage, most electronic supply shops and also online sell adjustable step up/down transformers to connect to the battery. Obviously the battery needs recharging after use.

Pleeease remember the polarity otherwise you will fry your router.
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Is there a workaround if the ONT needs 12V and the router only 9V?

Edit: I'm guessing the off the shelf mini UPS's manage this somehow, although it isn't clear from what I've read of the blurbs
 
onlinepaul said:
Is there a workaround if the ONT needs 12V and the router only 9V?

Edit: I'm guessing the off the shelf mini UPS's manage this somehow, although it isn't clear from what I've read of the blurbs
Click to expand...
As I mentioned you can get a step down DC transformer and set it to 9V you can just split the feed from the battery to 12V to the ONT and 12V to the transformer.
 
Been spending the past two weeks sorting out a possible (affordable) power backup solution for PoE devices that use af since that requires 48-52v since every damn PoE power backup doesn't do more than 24v.

Long story short there are only two ways for those interested.

Simple - Grab yourself a cheaper 220-240v inverter power backup solution, will run you around R4-6k but will then just be plug and play into the PoE switch or injector without a hiccup.

Complex - Using something like a 24v normal power backup solution which is more affordable, importing a bunch of parts such as a PoE step-up module from Alibaba and building a unit yourself, then assemble it with the 48-52v PoE af into a cheap TP Link PoE switch and use that to distribute the power off to the devices. Trying to see if we can't actually build a bunch for sale, since we have way too many security groups, and neighbourhood watch communities requesting this, since they have some ncam or other cloud camera systems.
 
ghostRgg said:
Been spending the past two weeks sorting out a possible (affordable) power backup solution for PoE devices that use af since that requires 48-52v since every damn PoE power backup doesn't do more than 24v.

Long story short there are only two ways for those interested.

Simple - Grab yourself a cheaper 220-240v inverter power backup solution, will run you around R4-6k but will then just be plug and play into the PoE switch or injector without a hiccup.

Complex - Using something like a 24v normal power backup solution which is more affordable, importing a bunch of parts such as a PoE step-up module from Alibaba and building a unit yourself, then assemble it with the 48-52v PoE af into a cheap TP Link PoE switch and use that to distribute the power off to the devices. Trying to see if we can't actually build a bunch for sale, since we have way too many security groups, and neighbourhood watch communities requesting this, since they have some ncam or other cloud camera systems.
Click to expand...
Expected Price?
 
richjdavies said:
Option 3.
Search alibaba and banggood for it...

m.alibaba.com

Svc 100w 12000 Mah Mini Dc Ups With 5v,12v,48v,24v Output For Nvr System External Adaptor - Buy Dc Backup Power Supply,Mini Dc Ups,Dc Ups For Nvr System Product on Alibaba.com

Svc 100w 12000 Mah Mini Dc Ups With 5v,12v,48v,24v Output For Nvr System External Adaptor - Buy Dc Backup Power Supply,Mini Dc Ups,Dc Ups For Nvr System Product on Alibaba.com
m.alibaba.com m.alibaba.com
Click to expand...
www.alibaba.com

Svc 100w 12000 Mah Mini Dc Ups With 5v,12v,48v,24v Output For Nvr System External Adaptor - Buy Dc Backup Power Supply,Mini Dc Ups,Dc Ups For Nvr System Product on Alibaba.com

Svc 100w 12000 Mah Mini Dc Ups With 5v,12v,48v,24v Output For Nvr System External Adaptor - Buy Dc Backup Power Supply,Mini Dc Ups,Dc Ups For Nvr System Product on Alibaba.com
www.alibaba.com www.alibaba.com

For those who don't want to use the mobile site.
 
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