8×21700 Battery Case 22.5W Fast Charging Solder-Free DIY

This DIY battery case features a transparent mech-style casing that showcases its internal structure with a modern, high-tech appearance.

Its see-through design lets you admire the eight 21700 batteries arranged inside, combining form and function.

Supports up to 8x 21700 flat-top batteries, delivering ultra-long battery life ideal for high-power applications.

Designed for battery voltages between 3.5V and 4.2V, ensuring compatibility with quality, high-capacity cells.

Equipped with 22.5W output power supporting multiple fast charge standards: PD 3.0/2.0, Flash Charge, SCP, QC 2.0 to 4.0+, FCP, AFC, PPS, PE 2.0, and SFCP.

USB output options include 5V/3A, 9V/2A, and 12V/1.5A formats with power delivery via Type-C for devices supporting PD protocols.

Modular design allows DIY assembly without soldering, making it accessible for hobbyists and professionals.

The case includes reverse polarity protection to safeguard the mainboard from damage if batteries are installed backwards.

• No soldering required for installation
• Built-in mainboard protection chip
• Spring contacts integrated but sensitive to short circuits

Built-in safeguards against overcharge, over-discharge, and short circuits protect both the battery pack and connected devices.

The LED indicator can be activated by a long press to provide visual status feedback.

• Output power: 22.5W
• USB Output: 5V/3A, 9V/2A, 12V/1.5A (only 5V available with multi-port use)
• IN Input: 5V/2A
• Type-C Output: 5V/3A, 9V/2A, 12V/1.5A (with PD support)
• Type-C Input: 5V/3A, 9V/2A, 12V/1.5A
• Operating Voltage: 3.3V–4.15V (voltage drop due to springs)
• Minimum battery capacity: 10,000mAh

• Solder-free battery case (battery not included)