Phone charger question

I think you have a bad cable.

On Mon, 19 Sep 2016 21:38:37 -0700 (PDT), Ivan Vegvary wrote as underneath :

No, you probably have not got a duff cable - they are not all the same - some have the outer shielding earth connected right through eg. some Apple etc. maybe also Samsung, some have a sense resistor built in to one of the data lines so that it can be recognized properly. If for a phone, ebay for a spare which is specificly for that phone, its just a safer bet otherwise buy the expensive OM one! For example most ordinary micro cables won't work with a USB3 connection though the standard says they should (though at a low data rate). They are not all the same! C+

Some USB cables have only 2 wires for +5 and 0. It *could* be that fast charge only happens if charger and tablet are able to talk together and agree on charge rate (using 4 wires)

Pere

Sometimes there's a resistor network on the D+ & D- lines that "negotiate" a charging rate.

Many wall wart chargers from discount stores are completely dumb, so I assume the resistor networks "talk" to the device being charged.

There might be some info here:-

Same thing with my tablet.

The common and sundry cables you get are AWG 26 wire (American Wire Gage - smaller numbers bigger diameter - fewer dies the wire had to pass through to get smaller -bigger the diameter the more current it can carry - the more current it can carry the faster your device charges)

So get a "charging cable" they have bigger diameter wire for the plus and minus power wires - the data wires are still 26 AWG. Get something with a 24, 22, or lower AWG rating - the longer the cable the more important that becomes.

Buy cables with the charging wire size specified. Go for the smallest AWG number. 24-22 is better than 26

AND get one of those gizmos on ebay/amazon that tells you the voltage and current. Cost is ~$5 and well worth it. Two meters one for voltage and one for current or one meter that switches back and forth.

If my tablet is charging at 1.6 amps, I know it will be done fast. If it is charging at 0.2 amps (200 milliamps) I know I'm aging faster than it's charging, and I have the wrong cable.

AND they have these "dummy loads" on ebay for $1. Plug it into a USB port and it checks the charger (if you have the aforementioned gizmo) one setting is 1 amp at five volts, and the switch will make that 2 amps at five volts,

Then you are in control of the situation.

Thank you Default.