Ventev recently introduced its EcoCHARGE wall charger that uses a tenth of the standy power while of the Energy Star no-load requirement: .03W vs .3W. Its list price on the Ventev site is $29.99 Let’s ...

So I've tended to assume, possibly stupidly, that if a device relies on a USB power connection at all then any old AC->USB power adapter is fine to use for it and substitutable for a computer USB port ...

USB has become as much a standard for connecting power to portable devices as it has for serial communication. Recently, the power aspects of USB have been extended to cover battery charging as well ...

My wife has an iPhone 3GS and she's lost the AC charging adapter. I told her I thought all AC adapters for USB devices were equivalent (we have several others lying around the house). She is afraid of ...

How many watts can a USB port actually output? The answer depends on your cable and protocol. Here is the ultimate guide to ...

If you want to charge your iPhone 12 using MagSafe, Apple recommends using certain 20W AC adapters — and they don't need to come from Apple, despite what you may have heard. We explain what the ...