Hi CaptainStarbuck,
Welcome to the Community Forums.
The Y740-17IRH is quite a power hungry beast, and looking over the specs, I wouldn't expect this to be a pc that is expected to run long on battery.
According to the psref documentation for the device, the estimated battery life for the Integrated Li-Polymer 76Wh battery is:
MobileMark 2014 is a highly unreliable battery life measuring program, and the new 2018 is only slightly better, unfortunately there's not many other programs out there, most brands use MobileMark from what I've seen, except for Apple I believe, they have their own.
It's normally a good rule of thumb to expect half of the estimated battery life, as the testing has been done with the computer being idle and running bare minimum settings (power saving power plan, lowest brightness etc). In this case, up to aprox 3h +/- depending on usage.
Most consumer devices come with AC adapters that give 45 to 65W, while gaming devices and high power demanding devices come with up to 260W AC adapters. And looking over the specs while also seeing that this device has 230W slim tip AC adapter, it's a good indication that it's not really meant to be long on battery power.
All battery devices I believe has a 1 year warranty, but I do believe the battery in question is still in good condition, and you check this by running a battery report:
Step 1. Generate a Battery Report:
- Follow the steps below in order to generate a Battery Report in Windows 10:
- Right-click the Windows Icon in the bottom left corner and select "Search"
- Type "cmd" into the search bar, right click the program showing up and select "Run as Administrator"
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- Copy and paste "powercfg /batteryreport /output "C:\battery_report.html" into the command prompt window. Without the quotations.
- Using Explorer navigate to C:\ aka the root directory. You should see a file labeled battery_report.html.
Check here on how to read it.
In the event there is battery degradation (Wh comparison), then you can try to run a battery calibration to help improve it:
Battery Calibration Programs:
Download the One Key Optimizer from this link and install it:
To calibrate battery in the One Key Optimizer.
1. Start the application - there should be a light blue icon on the desktop after you installed it.
2. Click on the tab named "Save energy".
3. Underneath "Save energy" there are 3 more tabs. Click on battery saving.
4. Click Calibrate
Now the calibration will start, note that this can take several hours
If you are certain it was a firmware update that caused this, and that the device was working better before this, then depending on the firmware update (some are one way streets), we can try to do a system restore or worst case, try to do a factory reset of the device. Please see the steps below:
Step 2. Rolling back to a previous Win 10 Version :
- Stay disconnected from the internet when performing the rollback until Step 3. is complete, so you don't have any instant updates that might re-cause the problem.
- Open the Windows 10 Settings Menu by clicking the gear icon in the Windows Start menu, or by pressing “Windows + I” keys.
- Click “Update & security”
- Click the “Recovery” tab on the sidebar.
- Under “Go back to the previous version of Windows 10,” click “Get started.”
- After some elapsed time after last update(10+ days), this option is often not available. Please continue below.
Step 2.2. System Restore Point
- There should always be a "restore point" you can choose from "System Recovery"
- Click the Windows key and type "System Recovery" and click "Recovery" in the list.
- Select "Open System Restore" - Click "Next" and select the latest "Restore point" where the device was working.
**Note: System Restore Points will only remove Apps and Programs installed after the selected Restore Point date. It will not remove word/text files or pictures etc.
Step 3. Disable Automatic Hardware drivers update
- Right click the Windows Icon, select the "Search" Function.
- Type "Control Panel" and select "Small icons" or "Large Icons" in the "View By" top right.
- Click the "System Icon"
- Navigate to "Advanced System Settings" -> "Hardware"
- Click "Device Installation Settings" and Select "No"
- Perform updates as necessary through Lenovo Vantage or from the Support Page.**This will prevent Windows from interfering with your hardware drivers in future updates, but keep crucial security updates rolling.
I believe the battery life is what it is for this device and that it's normal, but again, depending on the firmware update that might have caused issues (it being reroll-able or not), a factory reset might do the job (if the firmware update is no reroll-able, then it is unlikely the OKR will help)
Step 4. OKR - One Key Recovery
**This is a complete factory reset of the computer
**Loss of data can occur, so we advise you to backup your data if possible.
- Completely shut down the device.
- Press the Novo Button : It is the small reset hole on most devices that you need a unfolded paperclip to reach.
- In case you do not own a device with a OKR button. You can also find out where it is or what reset function it is for your device at the support page under.
Knowledge Base & Guides -> User Guides -> And clicking the User guide(Not HTML one) in the list -> Ctrl+F to search the document for "Reset" and/or "Novo Button" / "Novo Hole"
- When the system boots up, a menu will appear, select System recovery and follow the recovery process.
- When entering the Windows environment again. Perform step 3 before allowing any Windows updates.
Hope this helps shine some light on the subject and possibly help.
Regards
Voithos