It only the power bank case,batteries need to be welding and not included.

The battery needs to be connected in series circuit . Connect the positive pole of the battery to the "B"-end on the back of the motherboard, and the negative pole of the battery to the "B +" end on the back of the motherboard.

After welding, it is necessary to connect the power supply to charge the power bank and activate the power bank.Then it can be used normally.

Features:

A DIY power back case, can charge 4pcs 21700 batteries ( Batteries need to be welded and not included)

Support full protocol two-way PD fast charging 100W.

100W output supports PD QC- AFC SCP- multi-protocol fast charging for Laptop/phone/iPad 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

Specifications:

Item:for 4pcs 21700 Battery Charger Box

Capacity:20000mAh

Material: ABS-PVC

Color: Black

Size: approx 153x55x34MM

Input: DC 5V/3A ,9V/3A ,12V/1.5A ,10V/2.25A

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

Quantity: 1Set DIY Kits (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:

1Set x Power DIY Kits