Hi Fellow Arduinists, I was wondering if someone could help me to understand what is going on with my battery as it supplies a heatpad. I have an Arduino Uno running a couple of environmental sensors, LED's and a heating circuit (via a relay) for a high altitude balloon payload. The heat pad is des…

Maximising Battery Life - 9v 1200mAh Lithium powering a 5v Heatpad

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