T-OI ESP8266 development board with 16340 battery case, compatible with MINI D1 development board.

• Customized 16340 battery case to power the system.
• All IO ports available on both sides, compatible with the MINI D1 expansion version and breadboard distance.
• Available Grove interface, compatible with the Grove interface module and T-Watch sensor module.

Technical Specifications:

• Chip: ESP8266EX
• USB TO TTL Chip: CH340K
• Charging Chip: TP4054
• Battery Switch: Yes
• Battery Type: 16340 3.7V rechargeable battery (without battery)
• USB Interface: Micro USB
• WIFI Antenna: ceramic material antenna
• External antenna position available: with IPX mount
• FLASH: 4MB
• Product Size: 43.96 x 25.63MM
• Product Weight: 7.87g

Package Includes:

• 1 x ESP8266 development board