Tool-free assembly
Simply insert the battery and close the shell. No soldering or tools required.
- Free shipping
- 14-day easy returns
- Secure checkout
- Quality guaranteed
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Why customers love it
Build your own pocket-sized power bank in minutes
This compact DIY power bank case lets you create a custom portable charger using your own 18650, 21700, or 21650 rechargeable battery. No soldering or tools needed—just insert the battery, close the shell, and you're ready to charge on the go.
- Tool-free assembly: simply insert the battery and close the shell
- USB Type-C output for fast, convenient charging of your devices
- Pocket-sized design, similar to a lipstick, with a strap and built-in cable for easy carrying
- Charge and use your device simultaneously
- Works with most smartphones and USB-powered devices
- Durable ABS construction protects the battery and internal circuitry
Why you'll love it
Fast USB Type-C charging
USB Type-C output provides fast, convenient charging for your devices.
Pocket-sized portability
Designed like a lipstick with a strap and built-in cable, it's easy to carry anywhere.
Charge while you use
Charge and use your device simultaneously, keeping you powered without downtime.
Setup
Getting started
No electrician, no wiring, no fuss.
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Insert the battery
Open the shell and insert a compatible 18650, 21700, or 21650 rechargeable battery (not included).
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Close the shell
Snap the case shut—no tools or soldering needed.
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Charge your devices
Connect your smartphone or USB-powered device via the built-in USB Type-C cable and start charging.
Specs
The details that matter
Built to last outdoors, season after season.
- Battery type
- 18650, 21700, 21650
- Output
- USB Type-C
- Material
- ABS
- Number of slots
- 1
- Color options
- Pink, Green, Black, White
Comparison
Why choose this DIY power bank case
Not all products in this category are built the same.
Feature
SmartPicksWorld
Typical alternative
Assembly
Tool-free—insert battery and close shell
Often requires soldering or tools
Charging output
USB Type-C for fast, convenient charging
May use older USB-A with slower speeds
Portability
Pocket-sized, lipstick-like design with strap and built-in cable
Bulky and less convenient to carry
Simultaneous use
Charge and use your device at the same time
May require waiting for charging to finish
Our worry-free shopping promise
If your order arrives damaged, defective, or not as described, contact us within 14 days and we will make it right with a replacement or refund.
Frequently asked questions
Everything you might want to know before you order.
Which batteries are compatible with this power bank case?
This case is compatible with 18650, 21700, and 21650 rechargeable batteries. Please note that the battery is not included.
Do I need any tools to assemble the power bank?
No tools are required. Simply insert the battery and close the shell—assembly is completely tool-free.
What type of output does this power bank case provide?
It features a USB Type-C output for fast, convenient charging of your devices.
Can I use my device while it's charging?
Yes, you can charge and use your device simultaneously with this power bank case.
What material is the case made of?
The case is made of durable ABS construction, which protects the battery and internal circuitry.
Which devices can I charge with this power bank?
It works with most smartphones and USB-powered devices, making it versatile for travel, outdoor adventures, home, or school.
Shipping & returns
Shipping
- Delivers to United States (based on your selected country/region).
- Estimated delivery: 3–15 business days after dispatch.
- Shipping cost: Free.
Returns
You can request a return within 14 days after delivery. Standard returns have a €4.00 EUR (approximately $4.66 USD) flat-rate return shipping fee, deducted from your refund. Return shipping is free for items that arrived damaged, defective, or incorrect. Items should be unused and in original packaging where possible. Contact us before sending anything back.