WeMos D1 ESP-Wroom-02 ESP8266 Nodemcu WiFi Module with a 18650 battery charging system.

The development board incorporates the ESP8266 18650 battery. A standard LG 3000mah 18650 battery can operate for 17 hours.

Features:

• With nodemcu.
• Built-in 18650 charging system.
• LED indicator (green means full, red means charging). Charging and operation can occur simultaneously.
• 1 power control switch.
• 1 SMD socket available for sleep mode.
• 1 additional programmable LED (with gpio16 [do]).
• Charging current of 0.5a.
• Output 1A.
• Overcharge protection.
• Over-discharge protection.
• 10 digital pins (read/write/interrupt/PWM/I2C/line support except D0).
• 1 analog input with attention +/-.

Note: This product does not include a 18650 battery.