Router Battery Backup

I would assume the ports are connected in parallel, so it's 5A combined or up to 60W total. Any amount of amps 0-5A on any one port.
 
Gaz{M} said:
I would assume the ports are connected in parallel, so it's 5A combined or up to 60W total. Any amount of amps 0-5A on any one port.
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That would make sense to me too. So a 50W alarm (probably using signifcantly less) and a router should be good?
 
Speedster said:
It has 8x2200mah batteries, so at 5a and 80% that is a shade under 3 hours which should cover a loadshedding shift.
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Hang on, can you break that down please? Wouldn't 100% power draw (i.e. ~60Watts) give you a theoretical 1 hour of run time? Isn't that how they calculate the 60W? Full power draw for 1 hour?
IF so, how can 80% give you 3 hours? (Clearly I don't understand how to calculate these things).
 
K3NS31 said:
Hang on, can you break that down please? Wouldn't 100% power draw (i.e. ~60Watts) give you a theoretical 1 hour of run time? Isn't that how they calculate the 60W? Full power draw for 1 hour?
IF so, how can 80% give you 3 hours? (Clearly I don't understand how to calculate these things).
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Watts = Volts x Amps

In this case, everything is in 12V and the device can output 5A which equates to 60W. The batteries are rated at 2200 milliamp-hours each (i.e.2.2 amp-hours). 8 batteries is then 17.6Ah. Lithium ion batteries can comfortably be used for 80% of their capacity which leaves 14.08Ah. If we're using 5A, that means we should get 2.8 hours (or 2 hours 49 minutes) of use.

EDIT: The watts are calculated as the maximum current the device is rated for (before something blows), and the battery size gives an indication for how long it can provide power for (until the battery is dead). You could also do the same calculation in watt-hours (Wh) in which case you would need 60Wh to power 60W for one hour. At 12V, 60W is 5A so that 2200mAh is 26.4Wh. The 8 batteries then make for a total of 211.2Wh, of which 80% is 169Wh.This will power 60W draw for 2.8 hours, which is the same answer we got earlier.
 
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Speedster said:
Watts = Volts x Amps

In this case, everything is in 12V and the device can output 5A which equates to 60W. The batteries are rated at 2200 milliamp-hours each (i.e.2.2 amp-hours). 8 batteries is then 17.6Ah. Lithium ion batteries can comfortably be used for 80% of their capacity which leaves 14.08Ah. If we're using 5A, that means we should get 2.8 hours (or 2 hours 49 minutes) of use.
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OK, but you're assuming they've wired those 8 batteries in parallel to give you 17.6Ah. What if they're 4 parallel, 2 series. Would give you only half that. Which would make sense, cos if they do 8 in parallel then the voltage is pretty low and they need to boost it way up to get 12V / device. Or doesn't that affect the runtime as much as I think it would?
 
K3NS31 said:
OK, but you're assuming they've wired those 8 batteries in parallel to give you 17.6Ah. What if they're 4 parallel, 2 series. Would give you only half that. Which would make sense, cos if they do 8 in parallel then the voltage is pretty low and they need to boost it way up to get 12V / device. Or doesn't that affect the runtime as much as I think it would?
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If wired in that configuration you'll have 8800mAh at 24V, which would give the same output in watts. I doubt they've done this as that would require a step-down conversion back to 12V which would lead to some energy loss.

EDIT: Voltage is constant in parallel and is added in series, adding devices in parallel won't decrease the voltage.
EDIT 2: Looking at the specs, the batteries are 3.7V each so they are likely is a 4x2 configuration as suggested by @K3NS31. Also, peak output is then 14.8V.
 
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biometrics said:
Bets to call Sinetech to make sure.

Phone: 011 886 7874
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I spoke to David at Sinetech. He says the 12V ports are all connected on the inside, so he reckons you could run the full 60W on one of them. Also, they are indeed configured in 2 banks of 4 batteries each although he says the two banks are connected in "some funny way". Not exactly sure what that means, but I guess that gives us a good idea on what's going on inside those babies.
 
Speedster said:
I spoke to David at Sinetech. He says the 12V ports are all connected on the inside, so he reckons you could run the full 60W on one of them. Also, they are indeed configured in 2 banks of 4 batteries each although he says the two banks are connected in "some funny way". Not exactly sure what that means, but I guess that gives us a good idea on what's going on inside those babies.
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Good to know, better to be safe than sorry.

Quite impressed with them, a lady from there called today to ask if I'm happy with my UPS! How's that, nobody does that anymore. Anyway had to explain that they actually cancelled my 860 order and I got a 430 from Communica.

Also shared my issue with the 24V POE vs 48V 802.3af. She said she will pass on the message to the "engineers".
 
biometrics said:
Good to know, better to be safe than sorry.

Quite impressed with them, a lady from there called today to ask if I'm happy with my UPS! How's that, nobody does that anymore. Anyway had to explain that they actually cancelled my 860 order and I got a 430 from Communica.

Also shared my issue with the 24V POE vs 48V 802.3af. She said she will pass on the message to the "engineers".
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Hehe. I doubt their engineers will do anything. These things are straight off the production line in Shenzhen.
 
Bought this on Takealot as to keep the CPE and Router going during load shedding. Will report once delivered and setup:
766500
 
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