Router Battery Backup

I have a 6.4amp alarm box, manual says biggest battery it can take is 17ah. Any advice on linking a 20ah lithium to it? Will it work
 
tyerone said:
I have a 6.4amp alarm box, manual says biggest battery it can take is 17ah. Any advice on linking a 20ah lithium to it? Will it work
Click to expand...
You could hook up a 100ah battery if you wanted to, it just depends on how long you want it to charge for.
 
The manufacturer of the 6.4 amp specifies that nothing more than a 17Ah battery be attached. The charger output has a 3A limit.

What is the total load on the alarm system? If it's around 2.2A then you don't need to pay for an expensive lithium battery, just use the 17AH lead acid, and you should be good to go for about 3 years.

If the load is higher than 2.2amp but not more than 3 amp (these are high loads for an alarm system) you might get a slight benefit in that the lithium battery might last 5 years.

I doubt your alarm system could support that level of load, so in all honestly I believe a simple lead acid battery is the best solution. If i
 
chief786 said:
You can also get one of these lithium batteries. It's a direct replacement for Alarms and gate motors with built in BMS.
loadshedbuddy.co.za

Red Pole Energy - 12V 7Ah Lithium Battery - Alarm / Gate / UPS Lithium Battery Upgrade (12v 7Ah SLA Alternative)

Direct replacement for 12V 7Ah Lead Acid. This battery is exactly the same size and dimensions as standard gate and alarm batteries. Compatible with existing chargers and machines.
loadshedbuddy.co.za loadshedbuddy.co.za
Click to expand...
This battery won't help if the applied load is more than 1.4 amp, or you have stage 6 load shedding at any stage.

It's a waste of money if the load is 1 amp or less.

If the load is 1.5A or less, get a 17AH lead acid battery with A sherlo 6.4 amp backup, getting a similar lithium battery is a waste of cash.

If the load is higher than 1.5A you need to start looking at a different solution. Perhaps including a lithium battery and a larger capacity charger. Simply dropping in a similar lithium battery, or a 10 times larger lead acid battery won't help you.

All the above aims to get through stage 6 loadshedding, which implies at least one 4 hour period of outage.
 
Hi gents. Hope you are well. Just looking if someone can assist me I am looking for2. 5mm female to 1.35mm male adapter (I think this is the size) The nology ups I bought only comes with 2.5 to 2.1 adapter. I have been looking but unable to find one. If anyone one know where I can find one or a alternative solution that does not involve buying a new router.

Thanks in advance.
 
BrandonJ said:
This battery won't help if the applied load is more than 1.4 amp, or you have stage 6 load shedding at any stage.

It's a waste of money if the load is 1 amp or less.

If the load is 1.5A or less, get a 17AH lead acid battery with A sherlo 6.4 amp backup, getting a similar lithium battery is a waste of cash.

If the load is higher than 1.5A you need to start looking at a different solution. Perhaps including a lithium battery and a larger capacity charger. Simply dropping in a similar lithium battery, or a 10 times larger lead acid battery won't help you.

All the above aims to get through stage 6 loadshedding, which implies at least one 4 hour period of outage.
Click to expand...


So it will work just fine if the load is 1.00000001 amps to 1.4000000 amps!

Great

Luckily that is exactly the power that my modem draws, but only on Thursdays and Saturdays. The rest of the week if pulls 1.400000013 amps. I sure hope that this will not overload the battery...
 
Puffy_Nipples said:
Hi gents. Hope you are well. Just looking if someone can assist me I am looking for2. 5mm female to 1.35mm male adapter (I think this is the size) The nology ups I bought only comes with 2.5 to 2.1 adapter. I have been looking but unable to find one. If anyone one know where I can find one or a alternative solution that does not involve buying a new router.

Thanks in advance.
Click to expand...

Something like below

https://www.mantech.co.za/ProductInfo.aspx?Item=15M3076

https://www.geewiz.co.za/psu-dc-to-...ps-dc-adaptor-male-to-female-14-in-1-set.html

https://www.mantech.co.za/ProductInfo.aspx?Item=15M1723
 
deesef said:
So it will work just fine if the load is 1.00000001 amps to 1.4000000 amps!

Great

Luckily that is exactly the power that my modem draws, but only on Thursdays and Saturdays. The rest of the week if pulls 1.400000013 amps. I sure hope that this will not overload the battery...
Click to expand...
The numbers given, take into account a few concerns.

1. Assuming Stage 6 loadshedding, that is one 4 hour outage.
2. The Charge rate of the alarm system, I wouldn't know how you are charging the battery if you are using it to power a modem.
3. Since that load criteria, is for a lead acid battery, we want to stay around 50% dod through the 4 hour outage, or 80% for a lithium battery. At these cycles, the battery cycle life is maximized. So a lead acid battery would last approximately 3 years under those conditions, and the LifePo4 around 5 years.

It's no point getting upset, because of the load of the device. It is what it is. If you want to maximize the life cycle of the battery, while surviving 4 hour outages, then you have to design a accordingly.

For a router, I found this device to work outstandingly.
https://wootech.co.za/products/mini...bMDnvrl0NY1zvB5coUUwEHBuv4mIamc4aArMHEALw_wcB
 
deesef said:
So it will work just fine if the load is 1.00000001 amps to 1.4000000 amps!

Great

Luckily that is exactly the power that my modem draws, but only on Thursdays and Saturdays. The rest of the week if pulls 1.400000013 amps. I sure hope that this will not overload the battery...
Click to expand...
Late to the party but I think I have that exact PSU (It's a Sherlo, right?).
I used to have 2x 9AH in parallel but they finally died recently.
Replaced with 1x Securi Prod 7Ah Lithium. The one this forum said might actually only be 6Ah.

Lasted nicely through the recent bout of 3x approx 2hour loadshedding windows. (2 per day where they do late one night, then again in the early hours of the next morning, then later that day again).

I am impressed. Would still like to add a second one in parallel, but those things are like hens teeth.

Oh yes, the PSU is connected to a Telkom fibre NTU, a TPLink WAN router with Wifi, a second AP via PoE (non-48V); and a gigabit switch.
 
BrandonJ said:
Lifepo4 generally has 4 to 5 x longer cycle life than LI-ION, and more importantly has a much lower propensity to overheat and catch fire than the LI-ion version.
Click to expand...
Both are overkill for just a router and ONT so this would be somewhat important for longevity.
 
You must log in or register to reply here.
Back
Top
Sign up to the MyBroadband newsletter
X