Satellite L750-X5315 - Battery remaining time

Hello,
I got Satellite l750-x5310 yesterday and I tested it through and through. While running the tests on battery the backup was not as promised. Here is how I performed the battery test
1) I shut down the notebook
2) charged it for three hours 100%
3) disconnected adapter
4) powered on the notebook (cheked battery status, it showed 100%) and started using it for JUST internet email and USB data transfers no videos no gaming etc on "eco power saver plan". HERE IS WHERE THE PROBLEM COMES:
The batery sometimes shows 95% (4 HOURS REMAINING) after 5 mins 89% after 10 mins 76 % (2 HOURS REMAINING) and sometimes jumps back to 80% and after 1.5 hours from power on the notebook shuts down ann shows low battery indicator (orange) on front panel refusing to power on without adapter plugged in. I did the test three times
I need to know whats the actual battery backup of this notebook. Is this normal and is the battery run time 1.5 hours on eco plan without adapter when fully charged or 4 hours as promised by TOSHIBA?
Kindly help, thanks in advance

Hey,
Before you start with some battery tests I would recommend recharging the battery 5-10 times that it reaches the full capacity and performance. Otherwise you cant make realistic tests and 3 times recharging is not enough.
Regarding your tests some word of advice: The battery operation time on Toshiba website is checked with lowest screen brightness, without attached devices, eco mode power profile and if you do *nothing* on the computer. Internet and email needs battery power and not less. So you can make a test if of battery life if you do nothing but not with doing some work on the notebook.
Everything what you do no on the computer needs battery power ;)

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