KEBIDUMEI 8x18650 DIY Power Bank Case 22.5W USB-C Fast Charge

Build Your Own High-Capacity Portable Charger

The KEBIDUMEI DIY 8x18650 Power Bank Case is the ultimate shell for building a powerful, portable charging station. Designed to house eight 18650 cells (batteries not included), this robust enclosure supports up to 20,000mAh of capacity and delivers blazing-fast 22.5W charging through its USB Type-C and USB-A ports. Whether you're charging a smartphone, tablet, or other USB-powered device, this case has you covered with a wide range of fast-charge protocols.

Note: 18650 batteries are NOT included. This product is the power bank shell/case only.

Key Features

• Universal Fast Charging: Supports PPS, PD3.0/PD2.0, QC4+/QC4/QC3.0/QC2.0, AFC, FCP, SCP, PE2.0/PE1.1, and SFCP protocols for broad device compatibility.
• High Efficiency: Input efficiency up to 96%, output efficiency up to 95% — maximizing every bit of stored energy.
• 22.5W Super Fast Charge Output: Delivers up to 5V/4.5A or 4.5V/5A for compatible devices, plus 9V/2.5A and standard 5V/3A or 9V/2A modes.
• Wireless Charging Mode Support: Compatible with wireless charging functionality for added versatility.
• Digital Power Display: Built-in digital readout shows remaining charge at a glance, plus an LED indicator light.
• Temperature Loop Control: Integrated thermal management keeps your batteries and connected devices safe during charging cycles.
• Wide Battery Compatibility: Supports 4.2V, 4.35V, 4.4V, and 4.5V 18650 battery types, as well as JEITA specifications.
• Automatic Load Detection: Smart light-load and automatic detection for optimized charging efficiency.
• Durable Build: Constructed from quality plastic with a leather-finish exterior in your choice of black or white.

Technical Specifications

What's in the Box?

• 1 × KEBIDUMEI 8×18650 Power Bank Shell/Case
• ⚠️ Batteries are NOT included — you will need to source 8 compatible 18650 cells separately.

You May Also Like

• Portable Inflatable Travel Waist Cushion & Support Pillow
• Foldable U-Shaped Inflatable Neck Pillow for Travel
• Compressible Inflatable Travel Cervical Support Pillow

Learn more: EPA guidance on lithium-ion battery handling

Frequently Asked Questions

Q: Does the KEBIDUMEI 8x18650 power bank case come with batteries included?

A: No, the batteries are not included. This product is the power bank shell/enclosure only. You will need to purchase 8 compatible 18650 lithium cells separately. It supports 4.2V, 4.35V, 4.4V, and 4.5V battery types.

Q: What fast charging protocols does this power bank case support?

A: This DIY power bank shell supports a wide range of fast-charge protocols including PPS, PD3.0/PD2.0, QC4+, QC4, QC3.0, QC2.0, AFC, FCP, SCP, PE2.0, PE1.1, and SFCP — making it compatible with most modern smartphones and USB-C devices.

Q: What is the maximum output power of this 18650 power bank case?

A: The maximum output power is 25W, with a super fast charge output of up to 22.5W (5V/4.5A or 4.5V/5A). Output efficiency reaches up to 95%, ensuring minimal energy waste during charging.

Q: Is this power bank case safe to use with different battery voltages?

A: Yes. The case features built-in temperature loop control, JEITA specification compliance, and automatic load detection to help maintain safe and stable operation across supported 18650 battery types (4.2V–4.5V).

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.