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Old Oct 7, 12, 1:00 pm
Join Date: Nov 2008
Location: DTW
Programs: Delta PM, ICH PLAT
Posts: 1,135
Post #2 answered it. USB (except for USB 3.0) has a specification limit of 500mA (half an amp). Your iphone and ipad, while uses the USB interface, doesn't really conform to it in that it draws much much more current (over 1000mA for the iPad)....

Some devices will charge (slowly) even if it say it isn't charging, but will take a long long time.

I had some experience where my stock laptop adapter was drawing too much current and resetting the outlet's circuit breaker... so it didn't charge, changing to a 90W travel adapter made it work.

Your charger needs to be smart enough to draw only what is given, otherwise, it won't charge.

In the end, YMMV.
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