KEBIDUMEI 22.5W DIY 21700 Power Bank Case with LED Indicator
KEBIDUMEI 22.5W DIY 21700 Power Bank Case with LED Indicator
KEBIDUMEI 22.5W DIY 21700 Power Bank Case – Build Your Own Fast-Charging Power Bank
Take full control of your portable charging setup with the KEBIDUMEI DIY 21700 Power Bank Case. This welding-free battery shell lets you build a custom fast-charging power bank using two standard flat-head 21700 lithium batteries (not included). Featuring a built-in LED indicator, USB-A and USB-C ports, and support for 22.5W fast charging protocols, this DIY case is perfect for tech enthusiasts, makers, and anyone who wants a personalized, high-performance portable charger. Made in Mainland China.
Two Versions to Match Your Needs
- Standard Version: 10W output (5V/2A) – ideal for everyday charging needs
- Fast Charge Version: 22.5W multi-voltage quick charge protocols – powers up your devices faster
Key Features
- Welding-Free DIY Assembly: Simply insert 2 flat-head 21700 lithium batteries into the housing – no soldering or complex tools required. Note: Batteries are NOT included.
- Easy Activation: After installing your batteries, charge the power bank once to activate the circuit board for full charging output functionality.
- LED Charge Indicator: Built-in LED indicator lets you monitor battery status at a glance.
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Rich Multi-Voltage Output (22.5W Fast Charge Version):
- USB-A Output: 5V/3A | 9V/2A | 12V/1.5A | 10V/2.25A
- Type-C Output: 5V/3A | 9V/2.2A | 12V/1.67A | 10V/2.25A
- Dual-Function Type-C Port: Supports both input and output. Input specs: 5V/3A | 9V/2A | 12V/1.5A – for a convenient bidirectional charging experience.
- Detachable & Portable Design: Compact, lightweight shell that's easy to carry and maintain.
Specifications
- Brand: KEBIDUMEI
- Model: DIY Battery Box
- Compatible Battery: 2 × 21700 Flat-Head Lithium Batteries (not included)
- Max Output Power: 22.5W (Fast Charge Version)
- Output Ports: USB-A + Type-C
- Input Port: Type-C (bidirectional)
- Indicator: LED Battery Level Display
- Origin: Made in Mainland China
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Learn more: EPA guidance on lithium-ion battery handling
Frequently Asked Questions
Q: Does the KEBIDUMEI 21700 power bank case come with batteries?
A: No, the KEBIDUMEI DIY 21700 power bank case does NOT include batteries. You will need to purchase 2 flat-head 21700 lithium batteries separately to use the case.
Q: Do I need to solder or weld to assemble this DIY power bank case?
A: No soldering or welding is required. Simply insert your 21700 batteries into the shell, then charge the unit once to activate the circuit board before use.
Q: What fast charging protocols does the 22.5W version support?
A: The 22.5W fast charge version supports multi-voltage quick charge protocols via both USB-A (5V/3A, 9V/2A, 12V/1.5A, 10V/2.25A) and Type-C (5V/3A, 9V/2.2A, 12V/1.67A, 10V/2.25A) ports, making it compatible with a wide range of modern smartphones and devices.
Q: Can I use the Type-C port to both charge and discharge this power bank?
A: Yes! The Type-C port is dual-function, supporting both input (charging the power bank) and output (charging your devices). Input specs are 5V/3A, 9V/2A, and 12V/1.5A.
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.