The Icemag 3’s kickstand allows you to prop up your phone as it recharges. | Image: Cameron Faulkner / The Verge I’ve been testing compact, magnetic Qi2 power banks that can snap onto your phone for an upcoming buying guide. They make recharging much easier than bringing along a huge battery that weighs down your bag. One of my favorites so far is the Sharge Icemag 3 , a 10,000mAh model that can wirelessly output 25W to iPhone 16-series phones and newer models. It also offers a built-in kickstand and a 35W USB-C cable that doubles as a lanyard, plus a USB-C port for passthrough charging. For a limited time, Amazon Prime subscribers can get it in either white or black for $69.90 ($10 off), and Sharge will include a basic 60W USB-C cable for free when you add both items to your cart. Alternatively, you can get the Icemag 3 for $2 less (sans the free cable) through Sharge’s own storefront. Using code ICE15 will knock it down to $67.92.…