Router Battery Backup

airborne said:
If they are 18650 cells the battery pack has probably become unbalanced and one cell is preventing the pack from fully charging up. The battery packs are normally just covered in shrink wrap and it’s pretty easy to open them and charge each cell individually with jumper cables.
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do you have a link to the one you use? dont want to buy a dud
 
www.geewiz.co.za

Titan Elecstor 100W Mini UPS 24000mAh - 75WH

Power your router and fibre ONU (Optical Network Unit) during power outages. Keep your mobile devices charged with dual USB ports. 75Wh High-capacity LiFePO4 Lithium-Ion Batteries. Compatible with a wide range of routers. Intelligent protective design with over-charge, over-discharge, and short...
www.geewiz.co.za www.geewiz.co.za

Been looking at this but checking the specs: 24000mAh, 4 hour recharge time = 6 Amp charge rate.

Isn't that a bit much?
 
Rickster said:
www.geewiz.co.za

Titan Elecstor 100W Mini UPS 24000mAh - 75WH

Power your router and fibre ONU (Optical Network Unit) during power outages. Keep your mobile devices charged with dual USB ports. 75Wh High-capacity LiFePO4 Lithium-Ion Batteries. Compatible with a wide range of routers. Intelligent protective design with over-charge, over-discharge, and short...
www.geewiz.co.za www.geewiz.co.za

Been looking at this but checking the specs: 24000mAh, 4 hour recharge time = 6 Amp charge rate.

Isn't that a bit much?
Click to expand...
That brand is on promo on Takealot today, some amazing deals
 
airborne said:
That brand is on promo on Takealot today, some amazing deals
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Yeah I saw, I asked GeeWiz if the fan runs during battery mode or is it just for charging. No reply yet, I prefer if it doesn't run on battery so it doesnt kill the battery faster.
 
I never even heard my Gizzu or Electstor fans running during charging or on battery mode. I know they work on temperature from the one heatsink though. I have tested them when i added more cells to my units.
 
x7razor said:
I never even heard my Gizzu or Electstor fans running during charging or on battery mode. I know they work on temperature from the one heatsink though. I have tested them when i added more cells to my units.
Click to expand...

The Gizzu mini DC UPS doesn't have a fan, at least on my model.
 
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akescpt said:
bought lithium backup pump for the fish tank...drained to zero once...batteries wasted...want to open and check what kind of lithium batteries they contain...rather disappointed
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A lithium doesn't die with going to zero
Like a lead acid does

If t is dead then the charging system doesn't have a way to get the BMS out of protection mode

Putting a charger on the cells for n minute or so bypassing the BMS often gets the voltage to lift to get it out of protection mode and then they normally charge again

Similar to the jump start of lithium that has run flat on inverterss
 
leon.davibe said:
A lithium doesn't die with going to zero
Like a lead acid does

If t is dead then the charging system doesn't have a way to get the BMS out of protection mode

Putting a charger on the cells for n minute or so bypassing the BMS often gets the voltage to lift to get it out of protection mode and then they normally charge again

Similar to the jump start of lithium that has run flat on inverterss
Click to expand...
Most 18650 don't have protection
 
Bundu said:
Most 18650 don't have protection
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The circuit board must have

As overcharging 18650 causes fires
So safety wise I don't think you will get a product with zero protection for charging of lithium (I hope at least)
 
If the BMS is not packed inside the battery pack then it will be on the PCB. Like these DC UPS's all have it on the PCB. Even cheap solar lights and these emergency bulbs have a BMS
 
@x7razor please confirm the following with the Elecstor 24000mAh.

When the battery dies and A/C power is restored does the unit power itself on to output DC?

Because this takealot comment doesnt make sense.

I was highly disappointed in the product, it does not kick in when power comes on and charge when there is power (Not a UPS). You have to plug in your equipment when the power goes out which is very inconvenient.
Click to expand...
 
leon.davibe said:
The circuit board must have

As overcharging 18650 causes fires
So safety wise I don't think you will get a product with zero protection for charging of lithium (I hope at least)
Click to expand...
You said:
"A lithium doesn't die with going to zero
Like a lead acid does"
 
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