This document summarizes an experiment conducted to measure the energy consumption of progressive web apps (PWAs) on different mobile devices and network conditions. The experiment tested 7 popular PWAs on high-end and low-end Android devices over both WiFi and 2G networks. It found that PWAs consumed significantly more energy on low-end devices and over 2G networks. While service workers did not significantly impact energy usage, individual PWAs and usage conditions did influence energy consumption to varying degrees. A manual review of the service workers found no clear trends in how they were implemented across the tested PWAs.