Re: Battery information
While you are looking for a simple answer. There isnt one.
Each laptop is different. Plus what the laptop is used for also has a effect on this. Not to mention the type of battery being used. Along with how old the battery is and how many "cycles" (Times you have charged it and drained it) it has gone thru.
So in that respect you would be better off checking the manufacturer's website to see what they say the expected battery life is.
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Phone: LG Optimus G Pro
Running: Stock JB from LG with Nova Launcher