8x18650 DIY Portable Power Bank Shell – LCD Battery Box
8x18650 DIY Portable Power Bank Shell – LCD Battery Box
Build Your Own Portable Power Bank with 8x18650 Battery Storage Box
Take control of your charging setup with this DIY 8-slot 18650 battery storage box. Featuring an LCD digital display and dual USB output, this compact shell lets you build a custom power bank for smartphones, tablets, and virtually any USB-powered device. Made in Mainland China.
Key Features
- Holds 8x18650 Batteries — Compatible with flat-top positive electrode 18650 lithium batteries (sold separately).
- LCD Digital Display — Monitor real-time battery capacity at a glance for total charging confidence.
- Dual USB Output — 5V 1A and 5V 2A ports to charge multiple devices simultaneously.
- Fast & Versatile Charging — Compatible with 99% of USB devices including smartphones, tablets, and more.
- Temperature Protection — Built-in safeguard keeps your devices and batteries secure during use.
- Ultra-Portable Design — Compact dimensions (172 × 80 × 23 mm) and lightweight plastic construction make it easy to toss in a bag for travel or outdoor adventures.
- Premium Durable Material — Constructed from wear-resistant plastic for long-lasting everyday use.
- Available in White or Black — Choose the color that suits your style.
Specifications
| Input | 5V 2A |
| Output | USB 5V 1A / 5V 2A |
| Battery Slots | 8 × 18650 (batteries NOT included) |
| Material | Plastic |
| Dimensions | 172 × 80 × 23 mm |
| Colors | White, Black (optional) |
| Package Contents | 1 × Battery Storage Box Shell |
Important Notes
- 18650 batteries are not included — purchase separately.
- Only compatible with 18650 batteries with a flat-top positive electrode.
- Please ensure correct polarity (positive/negative) when inserting batteries.
- Do not close the cover until testing is complete — the cover cannot be reopened once shut.
- Allow ±1 cm tolerance due to manual measurement.
- Actual color may vary slightly from product images due to monitor differences.
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Learn more: EPA guidance on lithium-ion battery handling
Frequently Asked Questions
Q: Are 18650 batteries included with this external battery storage box?
A: No, 18650 batteries are not included. You will need to purchase 8 × 18650 flat-top batteries separately. Make sure the positive electrode is flat-top to ensure compatibility with this storage box.
Q: What devices can I charge with this 8x18650 DIY power bank shell?
A: This battery storage box is compatible with approximately 99% of USB-powered devices, including smartphones, tablets, Bluetooth speakers, and computers. It features a 5V 1A and 5V 2A dual USB output to accommodate various devices.
Q: How do I monitor the battery level with this storage box?
A: The built-in LCD digital display shows real-time battery capacity, so you always know how much charge remains. Simply check the display before heading out to ensure you have enough power for your needs.
Q: Can I reopen the cover after closing it?
A: No — once the cover is closed, it cannot be reopened. Please make sure you have tested the batteries and confirmed correct installation before sealing the box.
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.