Battery and accessories issue

[DG_7]

My HP Probook 450 G4 battery is discharging while it is still turned off. Diagnostic tool in hp assistant shows battery is OK. But why this is drained when not used? Also sometimes the touch pad stops responding and keyboard malfunctions(especially caps lock and C button), but it resolves spontaneously after some restarts. Please help! 

[IT_WinSec]

With regards to the battery drain,  it is normal for a battery to drain a little even when it is not in use and a batteries ability to hold a charge decreases over time. For example, when not in use, it might need to support your clock, USB port charging, etc...

• You can click this link for instructions how to Test and Calibrate your Battery
  Follow the steps to calibrate your battery - note that it may take a while to complete the procedure.

• The maximum charge capacity of every battery decreases over time and with use. The rate at which this capacity decreases can vary depending on product configuration, product model, operating system, type of software used, power management settings, and other factors.

• You may check these articles to improve your battery life (in general):

>> https://support.hp.com/us-en/document/c01297640

>> https://www.howtogeek.com/224501/how-to-improve-battery-life-with-windows-10s-new-power-settings/

• - Please, shutdown the computer using the power button (pressed and hold for a few seconds until PC powers off)

  - Power the computer back on.

  As soon as you press the power-on button, immediately begin hitting the Esc button (like tap-tap-tap) before any logo appears. This should open a HP Startup Menu >> https://www.youtube.com/watch?v=GSN0qzXayUY

  - Choose F10 to open your BIOS/UEFI. Follow the on-screen instructions to go
  Advanced tab > Port options

  Here, you can increase the percentage to like 50% to disable port charging when in sleep mode or off mode
  you may also disable/uncheck port charging

Hope this helps.

[DG_7]

• Thank you.  I never use USB port for charging other devices & I turn the laptop off from windows shutdown option, still my  battery level drops nearly 1% per day when kept unused. Is it normal? 
• Can you guide me about the keyboard and touchpad problems as mentioned in the question?