DIY 2x18650 USB Power Bank Case Kit – Battery Charger Shell

Build Your Own Portable Power Bank with This DIY 2×18650 Battery Charger Case Kit

Take control of your charging on the go with this versatile 2×18650 USB Power Bank Case Kit. Designed for electronics enthusiasts, hobbyists, and everyday users alike, this DIY shell kit lets you create a custom portable charger using two standard 18650 lithium-ion batteries (batteries not included). Compact, lightweight, and easy to assemble — it's the perfect solution for keeping your smartphone, MP3 player, and other USB-powered devices topped up wherever you are.

Key Features

• DIY Design: Assemble your own power bank with two 18650 cells for a fully customizable charging experience.
• USB Output: Standard USB port compatible with smartphones, MP3 players, tablets, and other electronic devices.
• Input Voltage: 4.5V – 5.5V for reliable and safe charging performance.
• Durable Shell: Sturdy black ABS housing protects your batteries and internal components.
• Compact & Portable: Slim, lightweight form factor fits easily in a pocket, bag, or backpack.
• Wide Compatibility: Works with most standard 18650 rechargeable lithium-ion batteries.
• LED Indicator: Built-in indicator light shows charging status at a glance.
• No High-Concern Chemicals: Safe construction with no hazardous materials.

Specifications

• Battery Type: 2×18650 (batteries not included)
• Input Voltage: 4.5V – 5.5V
• Output: USB
• Color: Black
• Condition: New
• Quantity: 1 unit
• Country of Origin: Made in China

What's in the Box?

• 1× 2×18650 DIY Power Bank Case Shell Kit (Black)
• Note: 18650 batteries are NOT included — please source compatible 18650 cells separately.

Perfect For

• Smartphone charging on the go
• MP3 players and portable audio devices
• Electronics hobbyists and DIY makers
• Emergency backup charging kits
• Camping, travel, and outdoor adventures

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Frequently Asked Questions

Q: Do 18650 batteries come included with this power bank case kit?

A: No, the 18650 batteries are not included. This kit includes only the DIY shell/case and charging circuit board. You will need to purchase two standard 18650 rechargeable lithium-ion batteries separately to use with this power bank case kit.

Q: What devices can I charge with this 2×18650 USB power bank kit?

A: This DIY power bank case kit is compatible with any USB-powered device, including smartphones, MP3 players, Bluetooth earbuds, small tablets, and other portable electronics. Simply plug your USB charging cable into the output port to charge your device.

Q: Is this power bank case kit safe to use?

A: Yes. The kit uses a built-in charging protection circuit that manages input voltage between 4.5V and 5.5V, helping to protect your batteries and connected devices. The shell is constructed with durable ABS plastic and contains no high-concern chemicals. Always use quality 18650 cells from a reputable source for best and safest results.