Imagine if you could recharge your smartphone's battery wirelessly, without the need to plug a cable into its port. Oh wait, you can totally do this thanks to Qi wireless technology. Using electromagnetic induction, Qi enables power to be transmitted over a short distance – from a charging pad to a phone's battery with coils acting as transmitter and receiver. Among the smartphones compatible with the Qi standard are the Samsung Galaxy S6, the Google Nexus 6, and the Motorola Droid Turbo.
To charge a Qi-enabled smartphone, however, you need one of the said charging pads. These come in various shapes and forms and usually sell between $20 and $60, depending things like design and features beyond wireless recharging. Where do you get one? Which one should you pick? The slideshow below holds the answers to these questions.