MacRumors posted a review on the HyperJuice Adapter
A quote from the article:
With Apple's AirPower still missing in action, accessory makers have started coming up with alternate solutions to allow the AirPods to charge using a Qi-based wireless charger.HyperJuice Adapter Review
Hyper's HyperJuice Wireless Charger Adapter is one such solution, adding wireless charging support to the AirPods for 50. The HyperJuice Adapter, which is made from a white plastic to match the AirPods, snaps on to the AirPods Charging Case.
One side of the HyperJuice Adapter is shorter than the other, and this side is meant to be positioned at the back of the case to leave the Bluetooth button on the back of the AirPods accessible. The front side of the adapter is longer and comes up close to the lid of the AirPods.