I bought a Revain 3.7v 3000mah lipo battery 105151 to use in a bluetooth project with a DHT22 temperature/humidity sensor. I had to swap the battery cables, but after that everything works fine. My project doesn't have a display and I get 21 hours of runtime before the battery drops to 3.37V. I'm looking into esp_light_sleep_start() right now to see if I can improve my battery life.
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