20000mAh PD100W DIY Battery Charger Case for 4×21700 Cells

This DIY battery charger case is designed for 4 pcs 21700 lithium batteries wired in series, providing a total capacity of 20000mAh. The kit includes the ABS-PVC black case and motherboard, enabling you to create a custom power bank tailored to your needs.

The transparent body features a high-quality imported LED screen that continuously displays the remaining power, giving an accurate real-time battery overview.

The case supports full protocol two-way PD fast charging up to 100W, suitable for charging laptops, smartphones, iPads, and more. It is compatible with PD, QC, AFC, SCP, and other mainstream fast charge protocols.

• Input: DC 5V/3A, 9V/3A, 12V/1.5A, 10V/2.25A
• Output 1 (Type-C): 5V/3A, 9V/3A, 15V/3A, 20V/5A
• Output 2 (Type-C): 5V/3A, 9V/3A, 15V/3A, 20V/3A
• USB Output: 5V/3A, 9V/2A, 12V/1.5A, 10V/2.25A

Batteries are not included and must be welded in series, connecting the positive pole to 'B+' and negative pole to 'B-' on the motherboard. After welding, connect the power supply to charge and activate the power bank. The unit is safe for air travel without declaration.

• Wires and welding accessories are not included
• Charge for 3-5 seconds after assembly to activate
• Cycle charge-discharge 3-5 times to calibrate power display if needed

Measuring approximately 153x55x34mm, the case offers a lightweight yet sturdy construction from ABS-PVC material, ensuring durability and safety during use. Its compact size makes it convenient for portable use.

• Battery Compatibility: 4 pcs 21700 lithium batteries (not included, welding required)
• Capacity: 20000mAh
• Material: ABS-PVC
• Dimensions: 153 x 55 x 34 mm
• 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
• USB Output: 5V/3A, 9V/2A, 12V/1.5A, 10V/2.25A

• 1 x DIY power bank case kit (motherboard and casing)