Design of a contactless battery charger for cellular phone. IEEE Trans. Ind. Electron. 2001, 48, 1238–1247. 6. The 60 Watt Specification. Available online: https://www.wirelesspowerconsortium.com/developers/60- watt-applications.html (accessed on 10 June 2018). 7. Zenkner, H.; Khan-...