It's on the right side of the device, above the power button.

This model is not user upgradable. A certified technician must do all of the work, so as to not void the warranty. There is one RAM memory slot within this configuration. This memory slot can support up to 8GB RAM, so your certified technician can replace the existing 4GB RAM stick and replace it with an 8GB stick.

That will depend on the requirements and compatibility of the specific game. We recommend you check with the game's software publisher's web site for their compatibility with Windows 10 S-Mode 64-bit operating system (Windows 10 S-Mode provides added security by only allowing APPs available ( and therefore certified by Microsoft) at the Microsoft Store. If you don't need the added security or you need to install APPs not available at the Microsoft Store, you can switch to standard Windows 10 Home 64-bit Operating System, at no additional cost.) and the minimum/recommended hardware requirements (Is a Graphics card required, the processor speed and the minimum required system RAM and the minimum available hard drive space) to run their program, then compare those requirements to this system's configuration.

The Lenovo IdeaPad S340-15 laptop ships with a 3CELL_52.5WH_INTERNAL, Lithium Polymer Battery.