Mobile USB Chargers discussion (Buyer Beware: see post 1) - Page 2 - Canadian TV, Computing and Home Theatre Forums

stampeder · 2010-11-05, 12:25 PM

Quote:

Originally Posted by JamesK

someone mention a 200 ohm resistor across a pair of pins in the USB cable

That's the official USB standard, as seen in the link in Post #1 (a zipped PDF file). Schematics are shown.

MarkerB · 2011-04-02, 03:31 PM

I just modified and documented the insertion of the 200 ohm resistor into a Belkin 1 amp Micro Auto Charger, and it's now charging my HTC Hero at 1 amp!

Here's the documentation on the upgrade:

http://www.ifixit.com/Guide/Repair/U...devices/5172/1

recneps77 · 2011-04-03, 11:40 AM

Forgot about this topic.
What I did in the end was take my belkin 3-port AC + 2 port USB power bar (they're constantly on sale for like $10.. you probably know which one I mean :P)
Well, I took the included "charge only cable" and used a mini-micro adapter.
5 second solution and no soldering required

My car adapter shows as "Charging (AC)" on my N1.

Petee_C · 2011-09-02, 10:10 AM

Is there a difference in terms of charging (specifically mobile) between these devices?

We have a iPad 2 and iPhone 3gs and 2010 model iPod Touch.

The wall wart that came with the iPad is larger than the one for the 3gs. I assume it can put out more Juice. The iPod didn't come with a wallwart, so we've been using a generic MiLi one.

I need a 12V adapter for the iPhone 3gs. Batteries are draining when I tether it via bluetooth so the kids can watch the slingplayer on the road.... Is this resistor issue a problem with the iProducts?

Way better than 3 hrs of "are we there yet?"

(Side note. Finally used up substantial bandwidth while tethering with the sling. Probably tethered for about 6-8h for video, ran up 1.6gb of data over a 30 day period....)

recneps77 · 2011-09-02, 03:06 PM

If it's a usb port charger there's no difference.
If it's a hard-wired plug charger, so long as the plug matches your device it should be fine.

Size of the adapter is not necessarily proportionate to output. It depends on the tech used inside as a transformer.
I've seen giant 500mA adapters that weigh like 1kg, and similarly tiny 2A adapters that weigh 50g

I believe the i-family has the 'smart' power source detector. If your car adapter is not compatible, your device will default to 500mA/standard usb charge, regardless of capacity.

2011-04-02, 03:31 PM	#17
MarkerB Rookie Join Date: Apr 2011 Posts: 1	Belkin 1 amp Micro Auto Charger modification to allow full Hero charging I just modified and documented the insertion of the 200 ohm resistor into a Belkin 1 amp Micro Auto Charger, and it's now charging my HTC Hero at 1 amp! Here's the documentation on the upgrade: http://www.ifixit.com/Guide/Repair/U...devices/5172/1

2011-09-02, 10:10 AM	#19
Petee_C Join Date: Feb 2003 Location: Heidelberg,ON Posts: 1,236	Apple iProduct charging, iPhone 3gs, 4, iPad 1,2 Is there a difference in terms of charging (specifically mobile) between these devices? We have a iPad 2 and iPhone 3gs and 2010 model iPod Touch. The wall wart that came with the iPad is larger than the one for the 3gs. I assume it can put out more Juice. The iPod didn't come with a wallwart, so we've been using a generic MiLi one. I need a 12V adapter for the iPhone 3gs. Batteries are draining when I tether it via bluetooth so the kids can watch the slingplayer on the road.... Is this resistor issue a problem with the iProducts? Way better than 3 hrs of "are we there yet?" (Side note. Finally used up substantial bandwidth while tethering with the sling. Probably tethered for about 6-8h for video, ran up 1.6gb of data over a 30 day period....) __________________ Panny 47wx52, DMR-e80*C DSR500x2, XBOX 360, Toshiba 26hf84, LG 37LC2D

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2011-04-03, 11:40 AM	#18
recneps77 Veteran Join Date: Apr 2007 Location: Whitby Posts: 2,815	Forgot about this topic. What I did in the end was take my belkin 3-port AC + 2 port USB power bar (they're constantly on sale for like $10.. you probably know which one I mean :P) Well, I took the included "charge only cable" and used a mini-micro adapter. 5 second solution and no soldering required My car adapter shows as "Charging (AC)" on my N1.

2011-09-02, 03:06 PM	#20
recneps77 Veteran Join Date: Apr 2007 Location: Whitby Posts: 2,815	If it's a usb port charger there's no difference. If it's a hard-wired plug charger, so long as the plug matches your device it should be fine. Size of the adapter is not necessarily proportionate to output. It depends on the tech used inside as a transformer. I've seen giant 500mA adapters that weigh like 1kg, and similarly tiny 2A adapters that weigh 50g I believe the i-family has the 'smart' power source detector. If your car adapter is not compatible, your device will default to 500mA/standard usb charge, regardless of capacity.