Hello, I am building a LoRaWAN-based IoT system and now looking for a solution for charging without USB. My device is composed of a FiPy (in LoRaWAN mode) + a pysense. To make it looks like a product, I consider a battery to replace USB cable for supplying power. But I am confused about how to choose a battery. For example:
What is the maximum voltage supply, 5.5V or 6V?
Should I consider whether battery can provide sufficient current?
can anyone give some advice?