Thread: Accessory Cable to charge
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Old August 19th, 2013, 02:10 PM   #7 (permalink)
Harry2
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Quote:
Originally Posted by Atomicmachine View Post
All depend the quality of the wires inside of the cable. One of my collegues she bought the 3m cable for the iphone and charge so quick then the original one. I just didn't had luck with purchase. That's why I was asking for feedback
Quality cables have written their AWG numbers on their sheath.
Most microUSB cables have just 28 AWG for data and power wires both. This is enough for data but not enough for power.
If a cable of 1m, driving an amperage of 1A, has better 24 AWG power wires the voltage drop caused by resistance would be about 0.5V less than with 28 AWG power wires.
Note, the USB standard voltage should be 4.75V to 5.25V on the phone's port while charging

So you'd look for a short 24AWG/28AWG (power/data), e.g. from DeLock.

BTW, the voltage drop calculator on that web site could give you an idea of the voltage drop's dependence by cable's AWG and cable's length ... note, for a cable of 3m you have to calculate 6m (round trip distance)
http://www.powerstream.com/Wire_Size.htm

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Last edited by Harry2; August 19th, 2013 at 02:24 PM.
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