USB Charger Cables?

elf_lord_ZC5

elf_lord_ZC5

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I recently bought a Muvit A900 Series power bank, from Pick n Pay.

Now this works well enough, but the cable that comes with it will not charge my Galaxy S6, but charges my Wife's S3 Mini fine, the Astrum cable I bought from CNA charges both, a Blackberry cable also does not charge either.

When all these cables are connected to my Samsung S6 charger, they work, and the devices charge as expected.

So why is the power bank so finicky?
 
Check if the current rating on the power bank is higher than the S6's charger. That could explain why some cables won't work.
 
afaik some phones has a "feature" to not allow any cable to be used as a pull up/down resistance or something is used on the data line. This could be it ? Cables that are not up to par with the current being drawn will only heat up ( unlikely as phones rarely go over 2A afaik
 
The power bank is rated at 5 volt at 1 amp. Half of what the S6 charger is rated at. Connectors appear to be the same. Results do not change if the phones are removed from their case coverings. All cables except the one that came with the power bank look to be thick decent quality. The one that came with the power bank is a bit on the thin side.
 
Actually, I think this has to do with the S6 Fast charging feature that's conflicting somehow.

The S6 shorts the USB ports on my work PC as it draws too much power. Maybe the standard cable quality is poor?
 
Power bank cable is short, the other cables are about standard charger lenght, except the Astrum cable which is a bit longer. Go figure.
 
Friend suggests, that it has to do with earthing resistance of the cables ...

Which I have no understanding of
 
It is not a cable.
elf_lord_ZC5 said:
The power bank is rated at 5 volt at 1 amp. Half of what the S6 charger is rated at. Connectors appear to be the same. [...]All cables except the one that came with the power bank look to be thick decent quality. The one that came with the power bank is a bit on the thin side.
Click to expand...
The first thing, I suspect that power bank do not support 1A charging as specified. Cable thickness suggests it. It probably has shortended D+ and D- for typical 500mA load. There are also proprietary standards to inform charged device about current source capabilities as explained in the quote from Wikipedia:
Before the battery charging specification was defined, there was no standardized way for the portable device to inquire how much current was available. For example, Apple's iPod and iPhone chargers indicate the available current by voltages on the D− and D+ lines. When D+ = D− = 2.0 V, the device may pull up to 500 mA. When D+ = 2.0 V and D− = 2.8 V, the device may pull up to 1 A of current.[95] When D+ = 2.8 V and D− = 2.0 V, the device may pull up to 2 A of current.
Click to expand...
Aple refused to charge if the charger did not produce required voltage levels on D+/D-. Samsung had its own D+/D- standard as well, earlier models use it (probably S3).

I think S6 depend entirely on the USB charging specification to save space normally occupied by the internal charging regulator. If it is true, it will not open a path for current to flow unless compatible charger is detected. Other devices which implemented such regulator will pull maximum current 500mA.

With multiple detection standards it is difficult to satisfy all devices on the market. Chip manufacturers have their own solutions, some work better than other. Examples:
https://www.pericom.com/support/technical-articles/how-usb-charges-just-about-any-electronic-device/
https://www.maximintegrated.com/en/app-notes/index.mvp/id/4803
 
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Those are horrible powerbanks. They get hot and charge your devices slowly. Next time, get a Romoss, Dauhsen or Adata powerbank. If you still have your slip, take it back for a refund.
 
It is my Wife's, as my phone was running short of juice this morning, she gracefully lent it to me. Voyage of discovery started - and onto this thread. Need to buy myself one sometime, but definitely something with a very much high capacity than the 2000mAh, of my wife's device - somewhere around 12000mAh or better if I can find it. For my Galaxy S6 and Tab4.
 
elf_lord_ZC5 said:
It is my Wife's, as my phone was running short of juice this morning, she gracefully lent it to me. Voyage of discovery started - and onto this thread. Need to buy myself one sometime, but definitely something with a very much high capacity than the 2000mAh, of my wife's device - somewhere around 12000mAh or better if I can find it. For my Galaxy S6 and Tab4.
Click to expand...

Romoss
 
Can you remember how much you paid for the Muvit? I got one from PnP yesterday for R199. It was a A900 series 12000mah.
Works fine on my iPhone 6s+

Was just looking on the webz to see how to charge the bank up and came across this thread.
 
Well it should charge fine with the cable it came with plugged into your iPhone chargers SUB charger. If not buy another usb/micro is cable at CNA, Incredible Connection, Game, Makro etc.

Have still not gotten around to buy myself a power bank :(

PS. Think I paid close to R140.00 for it back then.
 
Figured it out. For some reason doesnt charge on my USB3 port but does on the others.
what size did you get for the +-R140?
 
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