Features:
A DIY power back case, can charge 8pcs 18650 batteries ( Batteries need to be  welded and not included)
Support full protocol fast charging 22.5W, two-way PD fast charging 20W.
22.5W output supports PD QC- AFC SCP- multi-protocol fast charging for laptop  phone universal
You can take it on the plane without declaration, safe and reliable
Transparent body, imported high-quality LED screen can check the remaining power  in real-time

Note:

This product is a solderless mobile power supply kit  (circuit board+shell) and is not a finished product of a mobile power supply. It  does not include batteries, data cables, or box packaging. The battery needs to  be purchased separately with a 18650 (flat head) battery before use. Please note  that the battery capacity must be consistent. Do not place the battery upside  down as it will damage the motherboard.

Specifications:
Item:for 8pcs 18650 Battery Charger Box
Capacity:20000mAh
Material: ABS-PVC
Color: Gray/Yellow/Blue
Size: approx 145x41x53MM/5.7x1.6x2.09in
Input: DC5V / 2.1A/20W
Output: 5V/2.1A/PD22.5W
Quantity: 1 PC (Not includes the battery and charging cable)

Note:
1.Transition: 1cm=10mm=0.39inch
2.Please allow 0-1cm error due to manual measurement. pls make sure you do not  mind before you bid.
3.Due to the difference between different monitors, the picture may not reflect  the actual color of the item. Thank you!

Package Includes:
1 x Charging Case (Batteries are NOT include)


Q&A
1.Q:Does this product include accessories required for welding?
A:The package only includes some accessories such as the motherboard and casing  as shown in the main picture,
and the wires and other accessories required for welding are not included.

2.Q:What type of wire is required for welding?
A: 20AWG is the most suitable.22AWG and 18AWG are also can be used.

3.Q:What if there is no response when clicking the button after the battery is  soldered to the motherboard?
A:In some cases, the motherboard needs to be activated after welding is  completed. Charge it with a charger for 3-5 seconds to activate.

4.Q:The power display of the power bank quickly dropped to 1% and can still be  used. What is the reason for this?
A:This situation is because the motherboard and battery have not yet fully  matched. You can fully charge the power bank and then exhaust the battery inside  it. Cycle this process 3-5 times, and the power display of the power bank will  return to normal.