GitHub - IRNAS/IoT-battery-pack: PiRA - Power in Responsive Applications (IoT battery pack) developed for seamless use with a number of applications, primarily Safecast Soalrcast unit
New Solid State Battery Technology Targets IoT Devices
Low-Power IoT: Top 3 Ways to Improve the Battery Life of your Internet of Things Devices
Energy Harvesting Can Enable 1 Trillion Battery-Free Sensors in the IoT - Tech Briefs
Ultrathin Batteries for LoRa-based devices to Enhance IoT Sensors and Devices
Wireless battery-charger development kit for small IoT devices
Batteries for IoT Devices
Battery backup for small IoT devices? - Internet of Things Stack Exchange