Quote:
Originally Posted by rogerg
The devices are media players, mobile phones and HDD's that would ordinarily be charged and run while being powered by USB or their AC adaptors with ratings as specified. That is asside from one media player which can only be charged (and run from mains) by it's 3A power plug but is still 5v.
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In this case the plug packs only serve as power supplies. The charging electronics is built in to these devices.
You need to supply the correct voltage (too low and the device's voltage regulators may not function, too much and you might fry them). You also need to supply the minimum current these devices need. If the power supply is rated at a lower max output current than the device wants to draw you could fry the power supply, or the attached device may nor work/charge properly.
For one power supply to rule them all get a 5V 3A one.
Cheers
Steffen.