At one Starbucks location, I had difficulty finding an available Lightning recharger ring for my iPhone. So if you're a Starbucks regular, you might want to purchase a Powermat ring and keep it stowed in your bag. Starbucks stores sell them for $10 each.
One last thing that's worth a mention. The Powermat app for Android and iOS does some cool things in addition to helping you find Powermat spot locations. The app alerts you when your device's battery dips below a specific, customizable level (50 percent is the default), as well as when you're near a Powermat recharging spot.
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