DIY 22.5W Power Bank Shell – 3x18650 Solderless Battery Box

Build Your Own Portable Power Bank — No Soldering Required

The DIY 22.5W Power Bank Shell is a compact, solderless housing designed for 3x18650 batteries, giving you the freedom to assemble your own portable power supply without any technical expertise. Whether you're a hobbyist, a maker, or just someone who loves having backup power on hand, this versatile enclosure makes it easy. Made in Mainland China.

Key Features

• 3-Slot 18650 Design: Holds up to three 18650 cells in a secure, organized layout — perfect for DIY power bank builds and backup power projects.
• Solderless Setup: No soldering iron or PCB skills needed. Simply slide in your 18650 batteries and you're ready to go.
• 22.5W Fast Output: Delivers up to 22.5W of output power via USB A and integrated Type-C cable, capable of charging smartphones, tablets, and other everyday devices efficiently.
• Compact & Portable: The 8.2cm (3.23 inch) square body with a loop strap fits neatly in a pouch, backpack pocket, or drawer for grab-and-go convenience.
• Replaceable Battery System: Swap out individual 18650 cells as needed — no more throwing away the whole unit when batteries wear down.
• Built-In Power Display: The front display window shows remaining charge at a glance, so you always know how much power is left before heading out.
• Wide Voltage Range: Supports USB 5–20V DC, making it compatible with a broad range of devices and charging protocols.
• Durable Plastic Housing: Lightweight yet sturdy plastic construction protects your batteries during travel and daily use.

Specifications

What's in the Box

• 1 × Power Bank Shell Housing

Note: 18650 batteries, PCB, and charger are NOT included. Light reflection and different displays may cause slight color variation. Measurement tolerance: ±1–3cm.

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Learn more: EPA guidance on lithium-ion battery handling

Frequently Asked Questions

Q: Do the 18650 batteries come included with the power bank shell?

A: No, the 18650 batteries are not included with this DIY power bank shell. You will need to source three 18650 cells separately and insert them into the three battery slots. This solderless design makes the installation quick and straightforward with no tools required.

Q: What devices can I charge with this 22.5W DIY power bank housing?

A: This power bank shell supports USB 5–20V DC output via the integrated Type-C cable and USB-A port, making it compatible with most smartphones, tablets, earbuds, and other USB-powered devices. The 22.5W output capability allows for fast charging of supported devices.

Q: Is any soldering or technical knowledge required to assemble this power bank?

A: No soldering is required. This housing features a fully solderless, plug-and-play battery setup — simply slide your three 18650 cells into the designated slots and the unit is ready for use. It's ideal for DIY enthusiasts of all skill levels.

Q: Can I replace individual batteries in this power bank shell?

A: Yes! One of the main advantages of this design is the easily swappable battery layout. When a cell loses capacity over time, you can replace just that battery rather than discarding the entire unit, making this a cost-effective and eco-friendly backup power solution.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.