22.5W Fast Charging DIY Power Bank Case 20000mAh PD/QC/VOOC

Build Your Own 20000mAh Fast-Charging Power Bank

Take full control of your portable power setup with this 22.5W Fast Charging DIY Power Bank Enclosure. Designed for electronics enthusiasts and makers, this kit accommodates two 1260110 lithium battery cells (sold separately) and features a high-efficiency mainboard that supports PD, QC, and VOOC Flash Charge protocols — delivering rapid, reliable charging for a wide range of smartphones and devices. Made in Mainland China.

Key Features

• 22.5W Super-Fast Charging: VOOC Flash Charge protocol for rapid top-ups that save time and keep your devices powered throughout the day.
• Bidirectional Type-C Fast Charging: The Type-C port supports both input (charging the power bank) and output (charging your devices), compatible with PD 20W protocol.
• Multi-Protocol Support: Intelligent fast-charging chip compatible with mainstream public fast-charging protocols — works with a broad range of smartphone brands.
• Multi-Level Safety Protections: Built-in overcharge, over-discharge, overvoltage, and overheating safeguards for secure, worry-free operation.
• Real-Time Digital Battery Display: Slim, portable casing with a digital indicator so you always know your remaining battery level at a glance.
• DIY Assembly Design: Straightforward soldering process with clear assembly steps — a rewarding project for hobbyists and electronics builders.

Technical Specifications

Note: 22.5W refers to the VOOC Flash Charge protocol. Bidirectional fast charging operates under PD 20W. Simultaneous multi-port output does not support fast charging.

Assembly Tips

1. Before soldering, connect the charging cable for input testing — confirm the screen illuminates and the display is functional.
2. Solder battery leads directly to the mainboard. Twisted wires, crocodile clips, or spring contacts may cause insufficient power supply — avoid these methods.
3. Connect the positive terminal to B+ and negative to B−. Do not reverse polarity, as this will damage the mainboard and is not covered under warranty.
4. Use 3.7V lithium batteries only. Do not use lithium iron phosphate cells. Connect batteries in parallel — never in series.
5. The mainboard includes integrated protection circuitry; no separate battery protection board is needed.
6. After installing batteries, secure them with adhesive tape. Assess if spacers are needed to ensure a proper fit inside the casing.
7. Fully test all functions (input, output, fast charging, buttons, display) before closing the snap-fit casing — it is not designed for repeated disassembly. Ideally, complete several charge/discharge cycles before sealing.

Usage Notes

• Device Compatibility: Verify your device supports a public fast-charging protocol (PD/QC) before purchase. Proprietary protocols not listed may not trigger fast charging.
• Mainboard Warmth During Operation: Some warmth during fast charging is a normal result of energy conversion — this is expected behavior.
• Battery Level Accuracy: The display uses a self-learning algorithm. Readings may be approximate initially and will become more accurate after several charge/discharge cycles.

What's in the Box

• Package One: Module × 1 + Wires × 2
• Package Two: Full Kit × 1

Note: Battery cells are NOT included and must be sourced separately.

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Learn more: EPA guidance on lithium-ion battery handling

Frequently Asked Questions

Q: Do I need to buy batteries separately for this DIY power bank enclosure?

A: Yes. This product is the enclosure and mainboard module only. You will need to source two 1260110 lithium cells (3.7V) separately. The batteries must be soldered directly to the B+ and B− pins on the mainboard for proper operation.

Q: What fast-charging protocols does this 22.5W power bank module support?

A: The mainboard supports multiple protocols including VOOC Flash Charge (22.5W), Power Delivery (PD 20W bidirectional via Type-C), and Qualcomm Quick Charge (QC). It is compatible with a wide range of smartphones that use standard public fast-charging protocols.

Q: Can I charge multiple devices at the same time with this power bank kit?

A: Yes, you can use multiple output ports simultaneously. However, please note that simultaneous multi-port output does not support fast charging — only single-port use enables the maximum fast-charging speeds.

Q: Is it normal for the mainboard to get warm during fast charging?

A: Yes, some warmth is completely normal. During fast charging, higher power levels generate energy conversion losses that dissipate as heat. This is a standard physical phenomenon and does not indicate a fault with the module.

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.