20000mAh DIY PD 100W Power Bank Case for 4×21700 Cells

This power bank case is designed for DIY assembly with 4pcs 21700 batteries (not included). Users solder the batteries in series by connecting the positive to B+ and negative to B- terminals on the motherboard.

After soldering, connect a power supply to charge and activate the power bank for normal use. The case supports easy assembly for custom battery pack builds.

Equipped with full protocol support including PD, QC, AFC, and SCP, this case enables two-way fast charging up to 100W output.

Compatible with laptops, smartphones, and tablets from various brands such as iPhone, Xiaomi, and iPad for versatile charging needs.

• Two Type-C ports and one USB port
• Up to 20V/5A output on Type-C 1 port
• Universal compatibility with multiple fast charging standards

The transparent ABS-PVC shell displays the internal components while highlighting a high-quality LED screen that shows real-time remaining power.

This allows for quick power checks and adds a functional aesthetic to your DIY power bank.

• Durable ABS-PVC construction
• Clear view of battery status via LED screen

Measuring approximately 153 x 55 x 34 mm and weighing about 149 grams, the case offers a lightweight and compact solution for portable power storage.

Its design allows safe and reliable use, including on planes without declaration.

• Lightweight at 149g
• Compact size for easy portability

• Capacity: supports 4pcs 21700 batteries (batteries not included)
• Input: DC 5V/3A, 9V/3A, 12V/1.5A, 10V/2.25A
• Output (Type-C 1): 5V/3A, 9V/3A, 15V/3A, 20V/5A
• Output (Type-C 2): 5V/3A, 9V/3A, 15V/3A, 20V/3A
• Output (USB): 5V/3A, 9V/2A, 12V/1.5A, 10V/2.25A
• Material: ABS-PVC
• Color: Black

Includes one DIY power bank kit consisting of: case, motherboard, and accessories shown in product images.

Note: Batteries, welding wires, and charging cables are not included and must be sourced separately.

• DIY power bank case
• Motherboard with connectors
• Assembled casing parts