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18650 Battery DIY Storage Box with USB 5V 1A External Charger for Mobile Power
18650 Battery DIY Storage Box with USB 5V 1A External Charger for Mobile Power
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18650 Battery DIY Storage Box with USB 5V 1A Output & External Charger
A compact DIY power bank enclosure for standard 18650 lithium-ion cells, featuring a built-in USB 5V 1A output and an integrated external charging circuit. Designed for makers, hobbyists, and engineers who want to build a custom portable power supply for Arduino, ESP32, Raspberry Pi Zero, and other 5V USB-powered devices. No soldering required — insert your 18650 cell, connect the charger, and power your project.
Technical Specifications
| Parameter | Value |
|---|---|
| Compatible Cell | Standard 18650 Li-ion (3.6V–3.7V nominal) |
| USB Output | 5V DC, 1A (5W max) |
| Charging Input | 5V DC (via external charger port) |
| Boost Converter | Built-in 3.7V → 5V step-up (MT3608 or equivalent) |
| Charging Circuit | TP4056 or equivalent Li-ion charger IC |
| Operating Temperature | −20°C to +50°C |
| Dissipation Power | 5W max |
| Cell Not Included | 18650 cell sold separately |
Key Features
- USB 5V 1A Output: Standard USB-A port for powering Arduino Uno, ESP8266, ESP32, Raspberry Pi Zero W, and other 5V USB devices
- Built-in Charger: Charge the 18650 cell via the external charging port without removing the cell from the enclosure
- DIY-Friendly: No soldering required — slide in a standard 18650 cell and use immediately
- Compact Form Factor: Portable enclosure suitable for embedding in project enclosures, robot chassis, and wearable builds
- Low-Power Indicator: LED charge status indicator (charging / full)
Typical Applications
- Arduino & ESP32 Projects: Portable 5V power supply for Arduino Uno, Nano, ESP32, and ESP8266 wireless sensor nodes
- Raspberry Pi Zero: Compact battery power for Raspberry Pi Zero W and Zero 2W in portable camera, display, and IoT projects
- DIY Power Bank: Build a single-cell USB power bank for smartphone emergency charging or USB device power
- Robot & RC Projects: Onboard 5V logic power supply for robot controllers, servo drivers, and sensor arrays
- Field Sensor Nodes: Battery-backed power for outdoor LoRa, Zigbee, and WiFi sensor nodes with solar or USB recharging
- Prototyping & Lab Use: Portable bench power for breadboard prototyping without a mains power supply
FAQ
Q: Is the 18650 cell included?
A: No. The 18650 cell is not included. You need to supply a standard 18650 Li-ion cell (3.6V–3.7V, flat-top or button-top). Recommended capacity: 2000–3500mAh for best runtime.
Q: Can I charge and use the USB output simultaneously (pass-through charging)?
A: Pass-through charging depends on the specific board revision. In most configurations, charging and discharging simultaneously is not recommended as it may reduce cell lifespan. Check the LED indicators: charging LED on = charging mode active.
Q: What is the maximum current output?
A: The USB output is rated at 5V 1A (5W). For devices requiring more than 1A (e.g., Raspberry Pi 3/4), use a higher-rated power bank or a 2-cell configuration.
Package Contents
- 1 × 18650 DIY battery storage box with USB 5V 1A output and charger circuit
- 18650 cell NOT included
