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Computer Help and Support

MannyGoldstein

(34,589 posts)

3. Actually...

Reply to liberal N proud (Reply #2)

Tue Jul 24, 2012, 06:53 PM

Jul 2012

The voltage is always 5v for USB. The current rating of the charger (in amps, abbreviated A) indicates the max current that it *can* supply - the device drawing power can draw whatever current it needs up to that amount. If it tries to draw more, the worst that should happen is it won't charge.

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Question about USB charging for batteries [View all] csziggy Jul 2012 OP

Should be fine MannyGoldstein Jul 2012 #1

Check the power ratings for both devices first. liberal N proud Jul 2012 #2

Actually... MannyGoldstein Jul 2012 #3

There is no information on the power requirement for the speakers csziggy Jul 2012 #5

new power delivery spec for USB was announced yesterday pokerfan Jul 2012 #4

100 watts seems like overkill over usb. grok Jul 2012 #6

It doesn't specify the cable pokerfan Jul 2012 #7