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Help Powerbank voltage and amperage help

MaximusP

Lurker
Jan 11, 2020
3
0
Hello fellow users and citizens of the internet,

I intend to keep the health of my Galaxy A70 battery (4500mA) optimal for as long as possible, I try to keep my charge between 30-80% when possible, avoid fast charging when I don't need it (supports 25W charging), avoid high temperatures, rarely completely discharge or recharge it.

All of this and I still don't understand how voltage and amperage work in terms of battery health and safety.

Because I need to keep the charge between the mentioned interval I need to carry a powerbank, however, as far as I understand the voltage/amperage supported (5V;2A) isn't the same of the charger. I haven't used the powerbank yet because I need to buy a USB-to-USB Type-C cable, before I make the purchase I wanted to know if I should even use that powerbank so If anyone can share some knowledge, I'd appreciate it!

I've uploaded a photo of the device's charger and what it says.

Thank you and cheers!
 

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Normally everything in USB operates at 5v. That's a standard. So in that case your charger will output 5v at 3A.

The powerbank should also output 5v, but not necessarily at 2A. How much current you get from it is different for different powerbanks, but it usually is around 1A or 2A, maybe more.

As far as I know, using a powerbank shouldn't cause any significant effect on battery life. It should be fine to use it. Just make sure it's from a reputable manufacturer though.
 
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Normally everything in USB operates at 5v. That's a standard. So in that case your charger will output 5v at 3A.

The powerbank should also output 5v, but not necessarily at 2A. How much current you get from it is different for different powerbanks, but it usually is around 1A or 2A, maybe more.

As far as I know, using a powerbank shouldn't cause any significant effect on battery life. It should be fine to use it. Just make sure it's from a reputable manufacturer though.

I see, I didn't know that. The charger that came with phone actually uses Type-C to Type-C connection which I guess allows more voltage to flow for fast charging. Thanks for your answer!
 
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Something to keep in mind is USB charging standards continue to evolve so 5 volts applied to USB 1.x and 2.x but now with USB ver. 3, USB power is up to 20 volts.
https://en.wikipedia.org/wiki/USB#Power
Also, USB v3/USB Type-C have become more and more fractured as they've become victims to corporate oversight and proprietary lock-in, so the 'universal' in USB is becoming less and less valid:
https://lifehacker.com/why-your-usb-cable-might-not-charge-your-android-smartp-1840462438
https://people.kernel.org/bleung/how-many-kinds-of-usb-c-to-usb-c-cables-are-there
Your cabling is more likely something to be focused on so it's compatible with your phone, your charger less so. Just be sure to use a charger with adequate wattage, plus something that is a fixed matter -- amp x volt = wattage. So with that powerbank rated at 2a x 5v = 10 w; and that 4500mAh battery can theoretically take in 4.5 amps (1 amp = 1000 milliamps) it's going to work out OK but not optimal. But most consumer charging devices aren't rated to supply that much amperage anyway so it's not that much off the mark.
 
Upvote 0
Something to keep in mind is USB charging standards continue to evolve so 5 volts applied to USB 1.x and 2.x but now with USB ver. 3, USB power is up to 20 volts.
https://en.wikipedia.org/wiki/USB#Power
Also, USB v3/USB Type-C have become more and more fractured as they've become victims to corporate oversight and proprietary lock-in, so the 'universal' in USB is becoming less and less valid:
https://lifehacker.com/why-your-usb-cable-might-not-charge-your-android-smartp-1840462438
https://people.kernel.org/bleung/how-many-kinds-of-usb-c-to-usb-c-cables-are-there
Your cabling is more likely something to be focused on so it's compatible with your phone, your charger less so. Just be sure to use a charger with adequate wattage, plus something that is a fixed matter -- amp x volt = wattage. So with that powerbank rated at 2a x 5v = 10 w; and that 4500mAh battery can theoretically take in 4.5 amps (1 amp = 1000 milliamps) it's going to work out OK but not optimal. But most consumer charging devices aren't rated to supply that much amperage anyway so it's not that much off the mark.

Thanks for the info, I will take a look at the given links and consider everything when buying a cable. Cheers!

Hello fellow users and citizens of the internet,

I intend to keep the health of my Galaxy A70 battery (4500mA) optimal for as long as possible, I try to keep my charge between 30-80% when possible, avoid fast charging when I don't need it (supports 25W charging), avoid high temperatures, rarely completely discharge or recharge it.

All of this and I still don't understand how voltage and amperage work in terms of battery health and safety.

Because I need to keep the charge between the mentioned interval I need to carry a powerbank, however, as far as I understand the voltage/amperage supported (5V;2A) isn't the same of the charger. I haven't used the powerbank yet because I need to buy a USB-to-USB Type-C cable, before I make the purchase I wanted to know if I should even use that powerbank so If anyone can share some knowledge, I'd appreciate it!

I've uploaded a photo of the device's charger and what it says.

Thank you and cheers!
 
Upvote 0

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