Time for Science with iFixit! Today, let's learn about Envelope Tracking.

First developed in the 1930s to improve efficiency of high-power AM radio transmitters, Envelope Tracking is the continual monitoring and tuning of the power amplifier to match the power needed for the transmission, reducing wasteful excess energy supplied to the radio.

To simplify: less wasted power for longer battery life and cooler operation. More cat videos and a more comfortable pocket can be yours thanks to this technology.

Our Euro Mini is sporting an R2 Semiconductor R2AA217C Envelope Tracking Modulator, controlling the TriQuint TQP9059S Power Amplifier.