DIY 18650 USB Power Bank Case – Portable Battery Charger Box
DIY 18650 USB Power Bank Case – Portable Battery Charger Box
Build Your Own Portable USB Power Bank with a Single 18650 Battery
The DIY 18650 USB Power Bank Charger Case is a compact, easy-to-use enclosure that lets you create your own portable phone charger using a standard 18650 lithium-ion cell (battery sold separately). Whether you need an emergency backup charger for your smartphone, a lightweight travel power source, or a fun electronics project, this DIY battery case delivers reliable 5V/1A USB output in a pocket-friendly shell.
With its straightforward design and universal USB output, you can keep your devices topped up anywhere — no wall socket required. Simply insert your 18650 battery, plug in your USB cable, and you're ready to go.
Key Features
- Compatible with 1 × 18650 battery — widely available rechargeable lithium-ion cell (not included)
- USB output: 5V / 1A for charging smartphones, earbuds, and other USB devices
- Input charging: 5V / 1A via USB for recharging the 18650 cell inside the case
- Voltage regulator circuit — delivers stable, consistent output to protect your devices
- Compact & portable — slips easily into a pocket, bag, or backpack
- DIY-friendly design — ideal for hobbyists, makers, and electronics enthusiasts
- SMD components for a clean, reliable internal build
- No high-concern chemicals; new condition
Specifications
| Battery Compatibility | 1 × 18650 Li-ion (not included) |
| USB Output | 5V / 1A |
| Input Charging | 5V / 1A |
| Circuit Type | Voltage Regulator (SMD) |
| Quantity | 1 unit (case only) |
| Country of Origin | Made in China |
What's in the Box?
- 1 × DIY 18650 USB Power Bank Charger Case
Note: 18650 battery is NOT included. Please source a quality 18650 lithium-ion cell separately.
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Learn more: ENERGY STAR product efficiency guidance
Frequently Asked Questions
Q: Does the 18650 battery come included with the power bank case?
A: No, the 18650 lithium-ion battery is not included. You will need to purchase a standard 18650 cell separately and insert it into the case to use it as a portable USB charger.
Q: What devices can I charge with this DIY 18650 USB power bank case?
A: The case outputs 5V / 1A via USB, making it compatible with smartphones, Bluetooth earbuds, small tablets, and most other USB-powered devices that charge at 5V.
Q: Can I recharge the 18650 battery using this case?
A: Yes! The case supports 5V / 1A USB input, so you can recharge the 18650 cell inside the case by connecting it to any standard USB charger or power source.
Q: Is this suitable for DIY electronics projects?
A: Absolutely. This case is a popular choice among hobbyists, makers, and electronics enthusiasts who want a compact, customizable portable power solution for their projects.