Laptop shuts down at 3o-40% or sometimes 60% battery without warning

[najamhassan72]

I have an HP Elitebook 840 G5. Recently I noticed that the battery of my notebook gets drained out and it suddenly shuts off without any warning at 35-40% or sometimes at 60% battery level when I switch on the notebook. And whenever I turn on the power it charges from 0%.  I don't ever experience this unexpected shutdown without AC. Please how do I fix this.

[najamhassan72]

Warranty Type: 3

Cycle count: 69 / 1000

Manufacturer: 333-1C-26-A

Battery Age: N/A

Serial Number: 01363 2018/03/14

Temperature: 34 °C

Current: -490 mA

Terminal Voltage: 12112 mV

Design Voltage: 11550 mV

AC Power: No CT Number: 6GPRE05WYAL67L

Design Capacity: 50 WHr

Full Charge Capacity: 25 WHr (50%)

Remaining Capacity: 13 WHr