What is the current draw of a Wemos D1 mini board in deep sleep? And while connected to WiFi?
These are good questions when you are trying to power an ESP8266 board, like the Wemos D1 mini from a battery.
The best way to optimize power consumption is to use the deep sleep mode but not all boards are the same, even when talking about Wemos D1 mini boards. In fact the differences are considerable!