My Hp laptop not working without charger. Whenever power is cut then my laptop get shutdown.

[ImranAlam1]

My Hp laptop not working without charger. Whenever power is cut then my laptop get shutdown. My laptop born on 2018.

[WAWood]

@ImranAlam1 

From all indications, the batter is dead.

You can check the battery to some extent using Powershell built into Windows 10, as follows:
1) Press Windows key + X
2) Click Powershell in the menu
3) Type powercfg /batteryreport

This will generate a report and if you scroll down, you will see Design Capacity and Full Charge Capacity ratings. If the Full Charge Capacity is less than 50% of the Design Capacity, it is faulty and needs to be replaced.

Also note the figure alongside the "Cycle Count". This tells how many times the battery has been fully recharged. A typical battery can handle around 500 charge cycles, but some will fail sooner than that.