This is the new USB Battery Charging Standard in action with the Kindle Fire and the $19.95 Plugable 4 Port HUB with 2.5A Adapter and BC 1.1 support.
As both support the new standard, you can fast charge — even without a computer attached.
A few notes:
* The Kindle Fire has a standard USB micro-B connector, but the Fire doesn’t come with a USB cable in the box. You’ll need to buy that separately (in the video, we show using a cable borrowed from a Kindle Touch).
* The Kindle Fire will actually charge at up to 850mA. The video shows it pulling 650mA, because the Kindle is almost fully charged.
* The Apple iPad/iPod/iPhone are *not* BC 1.1 compliant, so this support is of no use for charging those devices at a faster rate. And the iPad won’t charge while the screen is on when connected to any standard USB 2.0 hub.
If you’re curious about our measurement rig, it’s a nice simple setup – just a multimeter and some passive components. Give a comment if it would be helpful for us to post the components we used.
We welcome any comments. Thanks!