18650 Battery Holder Case with Lead Wire, 2 Slot Storage Box, 3.7V, Black Plastic

Build a dependable portable power source for your electronics projects with this 2-slot 18650 battery holder case. Designed to securely house two 18650 lithium-ion cells, it provides a practical way to create a removable battery pack for prototypes, DIY devices, and field projects. The integrated spring terminals keep batteries firmly in place, helping maintain consistent electrical contact even when the project is moved or handled.

This holder comes with pre-attached lead wires (red for positive and black for negative), making it easy to connect to a DC-DC converter, power module, development board, motor driver, LED controller, or custom circuit. Whether you are assembling a battery-powered sensor node, a small robot, a portable tester, or an emergency power solution, this case helps you keep your build neat, serviceable, and easy to troubleshoot.

The plastic enclosure also acts as a simple storage and protection box for your cells during use in projects. It’s a common choice for makers working with Arduino-compatible boards, ESP32 WiFi modules, Raspberry Pi accessories (with appropriate regulation), and general electronics experiments where 18650 cells are preferred for their energy density and availability.

Important notes for safe use: use matched cells of the same type and condition, observe correct polarity, and add appropriate protection circuitry (BMS/protection board) and voltage regulation as required by your device. Output voltage depends on how you wire the holder in your project.

Specifications:
- Battery Type: 18650 lithium-ion (cells not included)
- Slots: 2
- Body Material: Plastic
- Contact Type: Spring terminals
- Wire Leads: 2-wire (red/black)
- Color: Black
- Application: DIY battery pack holder, portable electronics power, prototyping

Included Components: 2-slot 18650 battery holder with red/black lead wires