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  #13  
Old 02-23-2015, 03:41 PM
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Re: USB doesn't charge phone?

For everything, but Apple...

Buy this charger (or similar):
http://www.amazon.com/Charger-PowerI...4723572&sr=8-1
and this cable (or similar):
http://www.amazon.com/Mediabridge-Mi...4723648&sr=8-2

Never worry about it again. (Or at least as long as cell phones have USB 2.0 ports for charging.)

That charger may work with Apple, but since I don't use iPhone, I don't care to find out how well it works. The cable won't work with apple (obviously.)

I have had a similar setup since ~2010 and have yet to need to upgrade my car charging system due to a phone's changing power needs...

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Old 02-23-2015, 04:08 PM
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I had to get a proper USB power supply for my 2014, as none of the built-in ports are sufficient to keep a Nexus 7 tablet from steadily discharging the battery while it's plugged into the Jeep's USB and operating as a Torque HUD.

This one has served me well and supplies adequate power for tablets. As a bonus, my phone charges much faster than via the onboard USB ports. You know, like you'd expect given that it's supplying over 4x the power per port than the Jeep's USB ports do.

I like how it's essentially the size of the 12V jack.

Aukey 4.8A / 24W Dual USB Car Charger (The Smallest but Most Powerful Car Charger in the World)
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  #15  
Old 02-23-2015, 10:35 PM
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Re: USB doesn't charge phone?

My SG5,iPhone 5S and iPod 5th gen all charge from cubby with no issues.
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Old 02-24-2015, 09:17 AM
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Re: USB doesn't charge phone?

My iphone 6 and SG5 charge fine via the front USB. The posts here are correct in that the charge rate seems slower, but it does provide a positive charge. I also have one of those short stubby two USB port lighter adapters in the front console that gives me two additional charging points should I need them. The nice thing about the stubby adapter is that it looks almost like it came with the car because it is almost flush with the surface.
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Old 02-24-2015, 11:36 AM
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Newer devices simply require more current than the built in ports provide. Sure, your devices will charge slowly using the onboard ports if you leave them off.

However, plug in a high res tablet or phone, force it to keep the screen on, and run a CPU intensive app. You will find that the device battery steadily discharges even though the device will show "charging" status.

All USB ports are 5 volt DC. They differ in the current they will source. The original USB spec is 0.5 amp. Modern tablets can require 2.1+ amp under load. This directly correlates to power: if your USB port can only provide 2.5 watts and your device is using 10+ watts, what's going to happen? The difference between those two numbers has to be made up via the device battery.

In normal load circumstances, the difference between being able to provide 10+ watts rather than 2.5 watts is that the device battery will charge significantly faster.
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Old 02-24-2015, 05:18 PM
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Re: USB doesn't charge phone?

Don't forget that the charge cables are necessary on some Android phones as well. The USB cable that you use could slow down charging if the conditions are right.
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Old 02-24-2015, 05:27 PM
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Re: USB doesn't charge phone?

Quote:
Originally Posted by t1n0m3n View Post
Don't forget that the charge cables are necessary on some Android phones as well. The USB cable that you use could slow down charging if the conditions are right.
Yes, I use microusb charge cables with 20 AWG power wires to reduce I2R losses. This is the same concept behind those thick battery cables on our vehicles.

I definitely recommend 20 AWG if you're planning to have a longer cable (either in the vehicle or at home).

However, the charger's power rating per port is a much more important consideration. The 20 AWG charging cables just let you maximize the draw.
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