Back in 2014, Intel declared it wanted laptops to be free of wires, and a centerpiece of that plan was wireless charging. But the technology has been slow to mature, and it may be years before it takes off.

At CES last week, Dell showed a wireless charging PC called the Latitude 7285, a 2-in-1 with a detachable screen attached to a keyboard base. It's the first wireless charging laptop based on the AirFuel Alliance's emerging wireless PC charging standard.

But Dell doesn't have widespread plans to put wireless charging in a host of new devices. That's partly because the technology, with slow charging speeds, is limited to low-power devices and isn't mature enough to replace wired charging. The wireless charging Latitude 7285 has a low-power Intel Kaby Lake chip that draws just 4.5 watts of power.

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