A:AnswerYes it is possible.
Out of the box, this laptop comes with one 8 GB ram stick and another 4 GB ram stick for a total of 12.
To increase it to 16 GB, you need to remove the 4 GB stick and replace it with an 8 GB one.
A:AnswerThe battery life is good and can run for 6hour in full charge without electricity. However, I noticed some default, may be I wrrong, still I want to be sure before any judgment.
A:AnswerThis model does not have a removable battery. The computer would need to be taken apart in an ESD environment by a professional tech in order to have the battery replaced. You may not have an option to use a different cell battery, and may only be able to replace it with the same type it comes with.