2x 18650 Battery Shield V8 Module for Arduino and ESP32/ESP8266
2x 18650 Battery Shield V8 Module – Dual Battery Power for Arduino and ESP Boards
The 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.
Key Specifications
| Specification | Value |
|---|---|
| Battery Type | 2 x 18650 Li-ion (3.7V nominal) |
| Output Voltage | 5V DC (boost) and 3.3V DC (LDO) |
| Max Output Current | 1A at 5V, 800mA at 3.3V |
| Protection | Over-discharge, over-current, short circuit |
| On/Off Switch | Yes |
| Dimensions | 53mm x 30mm x 20mm |
What You Can Build With This
- Portable weather station with ESP32 and BME280 sensor
- Bluetooth-controlled RC car using Arduino Nano and motor driver
- IoT environmental monitor with ESP8266 and cloud data logging
- Mobile RFID access control system with Arduino Uno
Compatibility
This 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.
Wiring Notes
When 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.
Why Buy from Compoden
Every 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.
Is this compatible with ESP32?
Yes, the shield outputs 5V and 3.3V that match the Vin and 3.3V pins on ESP32 development boards. Just connect with jumper wires.
Does this shield charge the batteries?
No, it is a battery holder with voltage regulation only. You must charge 18650 cells with an external charger before inserting them.
What type of batteries should I use?
Use any standard 18650 lithium-ion cells with a nominal voltage of 3.7V. Unprotected flat-top cells fit best; button-top may be tight.
📦 Free Setup Handoff Document Included
Every 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.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items