DIY Mini Tube Power Bank Kit – USB Charger Stick (No Cell Included)

DIY Mini Tube Power Bank Kit – USB Charger Stick (No Cell Included)

Assemble your own compact USB power bank using a single 18650 Li-ion cell (not included). Great for small gadgets, LED lights, or emergency phone charging. Easy to assemble and fun for DIY enthusiasts.

⚡ Features

• Holds 1× 18650 Li-ion cell (battery not included)
• USB-A output (5V) for charging phones or accessories
• Micro-USB input (5V) for recharging the tube
• Integrated BMS protection – overcharge, over-discharge, and short-circuit safety
• Durable aluminum/ABS tube housing in multiple colors
• Lightweight and pocket-sized design

📦 Package Includes

• 1× Power Bank Tube Shell (color of your choice)
• 1× Micro-USB charging board
• 1× End cap and internal spring
• Note: 18650 battery not included

🔋 Ideal for hobby projects, DIY makers, and anyone who wants a customizable portable charger solution.

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Download “RenewSpark Tools” on the iOS App Store — the toolbox I use for battery building.