The 18650 is a rechargeable cylindrical lithium-ion battery with a diameter of 18mm and a length of 65mm, offering a nominal voltage of 3.6V-3.7V and a capacity of typically 2000mAh-3500mAh. Compared to AA batteries, it offers much higher energy density and a superior cost/performance ratio with thousands of charge cycles. It is mandatory to use with a charge management circuit such as the TP4056 and over-discharge protection before connecting directly to Arduino or ESP circuits; unprotected cells are particularly susceptible to short circuit and over-discharge. The portable ESP32/ESP8266 is the standard power supply choice for IoT projects, DIY power bank construction and wireless sensor stations that need to operate for long periods of time.
Projects using this component
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Bluetooth Controlled Car with L298N
2WD (two-motor, four-wheeled) robot car project that can be controlled from the phone with Arduino and HC-05 Bluetooth module. A total of four wheels are driven simultaneously by connecting two motors
5.0(38)
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Smart Irrigation Station
Autonomous plant irrigation system that works 24/7 with two 18650 batteries and LM2596 regulator without tiring Arduino. It automatically manages the water motor by continuously measuring soil moistur
5.0(42)
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Obstacle Avoidance Robot
How about building a smart vehicle that finds its own way? The Obstacle Avoidance Robot constantly scans its surroundings thanks to the ultrasonic sensor in front of it. When it encounters an obstacle
5.0(38)
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