Problems with battery life on idea Tab A2109A

I have retuned my idea pad twice to lenovo for repair due to long battery charge time and short battery life, received it back yesterday,charged it, downloaded my kobo library,around 10 minutes this morning it is now 55% wifi.bluetooth tec was switched off. have any other users had problems with battery life.(lenovo support say that it should run for 10 hrs on wifi dependant on what you are doing.)
Any help would be appreciated.
Bob

hi fireguy1957,
Welcome to the Forums.
Can you try to:
1. Ensure there's no recent apps running on the background
2. Turn off wifi, bluetooth, adjust brightness to minimum
3. Turn off automatic system updates under Settings > About Tablet > System Update > Auto Check Interval
4. Navigate to Settings > Apps > Running Tab and stop the process that you don't need to squeeze out more juice on that battery.
After you made the changes above, run the application that you use and observe the tablet.
Hope this helps
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