That said, the Dual's extra size accommodates today's beefed-up smartphones with big screens. Around back of the charger is a full-size USB port that accepts cables from a wide range of mobile devices.
Using the Qi wireless-charging standard, the Energizer Dual Inductive Charger is compatible right out of the box with a growing set of smartphones. These include the Nokia Lumia 920, Lumia 820, HTC Droid DNA, and LG Nexus 4, just to name a few. If you're one of the lucky owners of these devices, all you need to do is plug the Dual in and drop your phone onto its charging pad.
Charging should commence right away, with one of the LED indicators signaling that you're in business. You can also power up two devices at once by placing one on each charging station, or three if you connect a third gadget via USB.
While the LED lights look pretty slick, the Dual Inductive Charger doesn't also announce that charging has begun --- something theproducts do. Another neat trick this Energizer charger lacks is a magnetic click to let you know you've dropped your phone into the right spot. Powermat products are known for this little flourish.
Energizer also sells special cases separately for charging 3rd- and 4th-generation iPhones -- sorry, the iPhone 5 isn't supported yet. These extra sleeves cost $34.99 each.
I found that using the Energizer Dual Inductive Charger was pretty straightforward. In addition to its angled back and slippery surface, one minor gripe is that sometimes I had to fiddle with the position of my test phones before the charger began pumping juice into them.
One big caveat is that if your handset's battery has depleted entirely, no amount of time on the charging pad will revive it. This scenario occurred with my HTC Droid DNA, which I admit is one beast of a smartphone. The only way I could get the gadget to begin charging was to connect it to the Dual's USB port via a wired connection. In its defense, I observed the same thing with the Duracell Powermat.
As far as charging times goes, they seemed in line with performance I typically saw when using a physical connection. Energizer says that's to be expected since each pad is rated at 5W for power output, the same as most USB phone chargers. Its USB port also pumps out electricity at 5V but in 500mA, translating to a slower 2.5W.
Of course, the real benefit of using the Energizer Dual Inductive Charger is its convenience, if you're one of the lucky few who own phones that support its Qi charging standard. At $89, the Dual Inductive Charger is handy but pricey. That's even truer considering it doesn't do really anything you couldn't accomplish with the ordinary charger your phone came with. Still, the fact that it can power up to three gadgets at once is compelling since it'll certainly help to reduce desktop clutter. If you're looking for something more easily portable, however, then you'd be better served by Duracell's more expensive $99.99 , which is more compact and also comes with a portable battery for extra charge on the road.