Battery on taskbar not showing estimated time left in Windows 10 Home

This information was removed because it’s just an estimation and can be changed dramatically depending on what processes are running, how bright your screen is, and whether you’re connected to Wi-Fi or Bluetooth. Your computer is making an informed guess and displaying an estimated battery life in real-time. It can fluctuate wildly, and Microsoft seems to think it’s no longer useful.

If we are not seeing time estimation then we can check following places:

• firstly, on BIOS setting, if it's enabled or not
• secondly, on registry editor

BIOS settings windows 10 + HP

Depending upon the system, we can open BIOS setting windows => restart your system and continuously press F10 or Esc button (https://store.hp.com/us/en/tech-takes/how-to-enter-bios-setup-windows-pcs):

• Go to configuration tab
• Check Battery Remaining Time
• If it is disable then enabled it
  
• Save and restart system

Registry editor

• Type "registry Editor" in menu search box
• Open Registry Editor in administrator mode.
• In the Registry Editor, use the left sidebar to navigate to the following key. You can also copy and paste it into the Registry Editor’s address bar.
  

  Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power

• Please check following registry entries if available then delete these entries: 
  • EnergyEstimationDisabled and 
  • UserBatteryDischargeEstimator
  • Looks like
    
• Please check if following key available, if not available then add new one
  • EnergyEstimationEnabled
  • Add
    
  • rename
    
  • Set value
    
• Close Registry Editor and restart your machine. After you restart, you’ll see an estimated time remaining while hovering your mouse cursor over the battery icon in your notification area, also known as the system tray.