Blog Overview: IntroductionParts List and Arduino WiringArduino Code and Battery Charge TestsPython Code and Datalogging Battery Voltage OutputConclusion and Continuation Introduction Voltaic has added the ability to read the voltage, and thus the charge level, of the Li-ion cells in its V25, V50 and V75 USB Battery Packs. If you are building an IoT application … Continue reading Reading Charge Level of Voltaic USB Battery Packs