# Where would I find a USB charging cable for these headphones?

**URL:** <https://boards.straightdope.com/t/where-would-i-find-a-usb-charging-cable-for-these-headphones/520758>\
**Category:** Factual Questions\
**Created:** [December 10, 2009, 7:45pm UTC](https://boards.straightdope.com/t/where-would-i-find-a-usb-charging-cable-for-these-headphones/520758 "2009-12-10T19:45:17Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Hippy\_Hollow](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/hippy_hollow/32/4841_2.png) [@Hippy\_Hollow](https://boards.straightdope.com/u/Hippy_Hollow)\
**Post date:** [December 10, 2009, 7:45pm UTC](https://boards.straightdope.com/t/where-would-i-find-a-usb-charging-cable-for-these-headphones/520758/1 "2009-12-10T19:45:17Z")

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I’m a big fan of my Sony DR-BT22 Bluetooth headphones. But Sony stupidly built the charger to run off 110v, so it’s not that portable. You have to find a plug to charge it up.

I thought there might be a place online to create a USB charger. The wall wart reads:

INPUT: AC120V/ca120V, 60Hz 5W  
OUTPUT: DC3V/cc3V 1A

There’s also the diagram with a diamond with a (-) inside, a C (open side facing right, and a diamond with a (+) inside. The plug tip is very small.

Is this a possibility or more trouble than it’s worth?

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**Author:** ![Silophant](https://avatars.discourse-cdn.com/v4/letter/s/a698b9/32.png) [@Silophant](https://boards.straightdope.com/u/Silophant)\
**Post date:** [December 10, 2009, 8:46pm UTC](https://boards.straightdope.com/t/where-would-i-find-a-usb-charging-cable-for-these-headphones/520758/2 "2009-12-10T20:46:48Z")

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While USB does supply 5 volts, it maxes out at 500 milliamps, so you’d have to power it off two USB ports in parallel. Therefore, it’s a possibility, but probably more trouble than it’s worth.

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**Author:** ![tanstaafl](https://avatars.discourse-cdn.com/v4/letter/t/ba8739/32.png) [@tanstaafl](https://boards.straightdope.com/u/tanstaafl)\
**Post date:** [December 10, 2009, 8:50pm UTC](https://boards.straightdope.com/t/where-would-i-find-a-usb-charging-cable-for-these-headphones/520758/3 "2009-12-10T20:50:08Z")

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Any device that charges via USB can be charged from any USB source. I replaced (almost) all of my USB chargers with a powered USB hub. I got one with a 110/220 V wall wart so I can use it in the US or Europe (with an adapter) and use it all the time when traveling. It doesn’t even have to be connected to a computer; just plug it into the wall then connect the device to the hub with a USB cable.

(The one exception I have found is my iPod which, for some reason, will _not_ recharge when plugged into the hub unless it in turn is plugged into a powered-on computer. I don’t know why.)