It’s a high-speed low powered wireless technology ... Bluetooth devices’ battery information. However, Windows 11/10 understands only one of them (Bluetooth Low Energy GATT Battery Service).

Perhaps, if you’re building a wireless keyboard or just creating battery-powered device, you should consider ZMK, as it sure seems to be written with energy efficiency in mind. Want to learn ...

Wireless charging means you can recharge ... field that's converted into direct current (electrical energy) used by the iPhone's battery. The whole process is called magnetic induction.