Cheap Backup Option for running Modem during Powercut?

Shivam15

[OP]
Regulars
Aug 3, 2013
88
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Ranchi
Anyone knows any cheap backup option to run wifi modem during powercuts?? I have frequent powercuts and I want to use some method to run my modem even during powercuts?

I was thinking to buy a UPS battery of 7AH and run modem directly since the modem requires 12V and 0.5A. Any one knows how much Backup it will give if I use it?

Or any option cheap option under Rs.1000 to give atleast 2hr backup?

Thank you.
 

aatuif

the geek in chief
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Feb 22, 2011
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Imho, UPS is a bad choice if you have long outages (over 15 mins) as it will kill the battery in no time.

Recommendations:
1. There are portable mini inverters with inbuild 12V 7Ah battery available online (~50 watt) for ~1.5 k. They have rated backup of 3 hours and are designed for long outages.

2. You can also buy a mini solar powered inverter for close to 2 k.
 

Shivam15

[OP]
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Aug 3, 2013
88
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Ranchi
Hi,

I do not intend to buy a UPS as I already have a double battery UPS.

I meant using a UPS battery directly to run a modem i.e. via DC connection.
 


aatuif

the geek in chief
Regulars
Feb 22, 2011
516
143
Hi,

I do not intend to buy a UPS as I already have a double battery UPS.

I meant using a UPS battery directly to run a modem i.e. via DC connection.
7 Ah will last more than 5 hrs easily. How do you plan to charge it though ?
 


Shivam15

[OP]
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Aug 3, 2013
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^^ I have a small charger thing to charge battery.

Also, do you know how much Ampere comes out from a 7AH battery? Because our modem requires 0.5A only.
 

tictactoe

Member
Nov 24, 2016
8
1
Get CFL inverter , you can easily get 3-4 hours back up on Modem with CFL inverter costing around 2k

 

aatuif

the geek in chief
Regulars
Feb 22, 2011
516
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^^ I have a small charger thing to charge battery.

Also, do you know how much Ampere comes out from a 7AH battery? Because our modem requires 0.5A only.
The current draw will be 0.5 A.

Only thing to ensure is that the voltage should match.