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Low power solution for ESP32 with Lipo battery
Low power solution for ESP32 with Lipo battery June 2, 2021 June 3, 2021 colin Home Blog Low power solution for ESP32 with Lipo battery I want to develop an IOT product with ESP32 MCU, it should with 18650 Lipo battery, and the battery life should be as long as possible. After study current solutions, I found most of them have some problems. Before go further, let’s check 18650 discharge characteristics first. 18650 Battery Discharge Curve. Source: batteryuniversity.com If discharged at 0.2C, at the discharge cutoff of 3.0V/cell, produces only about 3200mAh. Most of product use ESP32 module, ESP32-WROOM-32D . It work voltage rang is: 3.0 V ~ 3.6 V. Current min 500mA. ESP32-DevKit-LiPo ESP32-DevKit-LiPo Github link . Feature: ESP module: ESP32-WROOM-32D With USB input, changer and program. External 5V input. USB, Battery power path choose. USB to URT with CH340T. Battery IC BL4054B-42TPRN(SOT23-5). Charge current 455mA. Power to ESP32 with SY8089AAAC. It’s a 5.5V, 2A continuous, 3A pe
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