{"product_id":"2x-18650-battery-shield-v8-module-for-arduino-and-esp32esp8266","title":"2x 18650 Battery Shield V8 Module for Arduino and ESP32\/ESP8266","description":"\u003ch1\u003e2x 18650 Battery Shield V8 Module – Dual Battery Power for Arduino and ESP Boards\u003c\/h1\u003e\u003cp\u003eThe 2x 18650 Battery Shield V8 Module is a compact power solution that holds two 18650 lithium-ion cells and converts their output to stable 5V and 3.3V rails. Designed for direct stacking on Arduino boards or wiring to ESP32\/ESP8266, it enables portable and wireless projects without tethering to a USB supply. Built-in protection circuits prevent over-discharge, over-current, and short circuits, ensuring safe operation for your microcontroller and peripherals.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery Type\u003c\/td\u003e\n\u003ctd\u003e2 x 18650 Li-ion (3.7V nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage\u003c\/td\u003e\n\u003ctd\u003e5V DC (boost) and 3.3V DC (LDO)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Output Current\u003c\/td\u003e\n\u003ctd\u003e1A at 5V, 800mA at 3.3V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection\u003c\/td\u003e\n\u003ctd\u003eOver-discharge, over-current, short circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOn\/Off Switch\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e53mm x 30mm x 20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-indoor-weather-station\"\u003ePortable weather station with ESP32 and BME280 sensor\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-bluetooth-controlled-car\"\u003eBluetooth-controlled RC car using Arduino Nano and motor driver\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/arduino-nano-33-iot-data-logging-project-kit\"\u003eIoT environmental monitor with ESP8266 and cloud data logging\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eMobile RFID access control system with Arduino Uno\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThis shield connects directly to Arduino Uno, Mega, and Nano boards by stacking onto the power and ICSP headers. For ESP32 DevKit and ESP8266 NodeMCU, use jumper wires to connect 5V to Vin, 3.3V to 3.3V, and GND to GND. It operates with standard 18650 cells providing 3.7–4.2V each, and the onboard regulator handles efficient conversion for all common 5V and 3.3V logic.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eWhen stacking on an Arduino, align the headers carefully—the shield uses the ICSP port for additional power routing. For ESP boards, confirm polarity before connecting: red wire to positive 5V output, black to GND. Do not insert batteries while the switch is on, and always match the positive terminals to the marked + symbols on the holder.\u003c\/p\u003e\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with ESP32?\u003c\/summary\u003e\u003cp\u003eYes, the shield outputs 5V and 3.3V that match the Vin and 3.3V pins on ESP32 development boards. Just connect with jumper wires.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes this shield charge the batteries?\u003c\/summary\u003e\u003cp\u003eNo, it is a battery holder with voltage regulation only. You must charge 18650 cells with an external charger before inserting them.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat type of batteries should I use?\u003c\/summary\u003e\u003cp\u003eUse any standard 18650 lithium-ion cells with a nominal voltage of 3.7V. Unprotected flat-top cells fit best; button-top may be tight.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444945281389,"sku":"CDN-0023","price":480.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_5af9cb24-9c47-4995-8c83-7b734bfb223a.jpg?v=1781512092","url":"https:\/\/compoden.com\/products\/2x-18650-battery-shield-v8-module-for-arduino-and-esp32esp8266","provider":"Compoden","version":"1.0","type":"link"}