#Deal: Li-ion battery 18650 rechargeable 3.7V large capacity (2500 to 9800mAh) for IoT DIY Projects
The Li-Ion 18650 rechargeable batteries allow you to develop stand-alone IoT connected objects. They will be ideal to operate your probes and sensors (temperature and humidity, atmospheric pressure, air quality, door opening detector and window, water leakage …) developed from Arduino, ESP8266 or ESP32. The life of the battery depends strongly on the type of sensor used, the operating temperature (the cold decreases the battery charge) and the frequency of sending the data to a server or online service (cloud).
The 18650 batteries deliver a 3.7V voltage compatible with the Arduino, ESP8266, ESP32 and Raspberry Pi or Orange Pi mini-PC. The 18650 designation gives no indication of battery capacity. It can vary from 2500mAh to 12000mAh (the price goes with). The standard value is 3500mAh. Check the storage capacity before purchasing. Observe the charging / discharging guidelines to preserve battery life.