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

The battery needs to be connected in parallel. 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.

Professional PD22.5W DIY Battery Charger Case Fast Charging Case for 8PCS 18650 Polymer 20000mA Battery Charging Power Bank Box

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

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 PC x Charging Case