COVELL 24V Battery & Cooling Fan Set

Purchased 2 weeks ago.
I bought two sets, one for work and one for my hobby at home.
One set, as shown in the photo, is brand new, unused, and unopened.

In my personal opinion,
I used a 12V product before.
COVELL's 24V has sufficient airflow and is cool.
A TYPE-C charger is not included, and it takes a long time to charge with a 20W charger, so I recommend a 30W charger. With that, it took about 6 hours to charge from 25% to 100%. Honestly, the charging time seems to be longer than stated.
Please check the COVELL information page for details.

The following is from the information page:

Size: Battery: H105×W70×D33mm
Fan: H36×W90×D9mm
Weight: 710g
Maximum Airflow: 85L (approx. 4 hours continuous operation)
Accessories: 24V battery, 2 fans
Charging cable x 1, Fan connection cable x 1, Instruction manual
Battery Capacity: PYCOI 22000mAh/3.85W 84.7Wh Max
Output Voltage: DC
Charging Time: 12V1.5A - 4.8 hours / 9V2A - 5 hours / 5V3A - 6.7 hours / 5V2A - 8.5 hours
Operating Environment Temperature: 0℃?40℃
Continuous Operation Time: Drive Voltage 12V - 16 hours / Airflow 48L/S
Drive Voltage 16V - 9 hours / Airflow 61L/S
Drive Voltage 20V - 6 hours / Airflow 77L/S
Drive Voltage 24V - 4 hours / Airflow 85L/S
Can be attached to 99% of air-conditioned clothing.

Thank you.