In Stock
18650 2-Cell Battery Holder for DIY Electronics & Arduino Projects
Rs. 75.00
Inclusive of all taxes
Free Shipping on prepaid orders above ₹999
Ships in 3-7 days
7-Day Warranty on manufacturing defects
Need 10+ units? Contact us for bulk pricing
100% Genuine Products
Expert Technical Support
Quality Tested
Soldr.ai
Ask about this product
18650 2-Cell Battery Holder - 7.4V Series Output
This 2-cell 18650 battery holder connects two 3.7V lithium-ion cells in series, delivering a nominal 7.4V output ideal for powering Arduino, ESP32, and Raspberry Pi projects.
Key Specifications
| Battery Compatibility | 2 × 18650 (not included) | Confirmed |
| Connection Type | Series (2S) | Confirmed |
| Nominal Voltage | 7.4V (8.4V fully charged) | Typical |
| Max Current | Up to 2A (cell‑dependent) | Estimated |
| Connector | JST PH2.0 male plug, 15cm wire | Typical |
| Material | ABS plastic | Typical |
| Dimensions | ~77 × 38 × 20 mm | Estimated |
| Weight | ~20 g | Estimated |
What You Can Build With This
- Arduino Weather Station: Power an outdoor sensor node with a 7.4V Li‑ion pack and solar charging circuit.
- ESP32 Wi‑Fi Repeater: Build a portable network extender running directly from the holder’s regulated 5V output.
- Raspberry Pi Handheld Console: Use a step‑down converter to safely power a Pi Zero gaming handheld.
- CBSE Class 12 Physics Project: Demonstrate series voltage addition with two 18650 cells in a hands‑on practical.
- B.Tech Smart‑Cart Final Year Project: Supply a mobile robot’s motor driver and microcontroller with a compact 7.4V source.
Compatibility
| Platform | Compatible | Connection | Library / Method |
|---|---|---|---|
| Arduino Uno R3 | Yes | Vin, GND | Onboard regulator accepts 7‑12V |
| Arduino Nano | Yes | Vin, GND | Same as Uno |
| Arduino Mega 2560 | Yes | Vin, GND | Same as Uno |
| ESP8266 NodeMCU | Yes | Vin, GND | Vin accepts 5‑12V (LDO regulator) |
| ESP32 Dev Board | Yes | Vin, GND | Vin accepts 5‑12V (AMS1117 reg.) |
| Raspberry Pi Pico | Yes, with buck converter | VSYS (5V), GND | Step‑down to 5V required |
| Raspberry Pi 4 / 5 | Yes, with buck converter | 5V GPIO pin, GND | Stable 5V supply needed |
Wiring and Interface Notes
Connect the red wire (positive) to a board’s Vin or a regulator input, and the black wire (negative) to GND. Always insert cells with correct polarity as marked on the holder. For 3.3V or 5V systems, use a buck converter to step down the voltage to the required level.
Frequently Asked Questions
Can I use two different 18650 cells in this holder?
Using mismatched cells (capacity, age, brand) is not recommended; it can cause uneven charging/discharging and potential damage.
What is the maximum current this holder can safely deliver?
The holder’s contacts can handle up to 2A continuous, but actual current depends on the installed 18650 cells.
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