To start off, let's go over what system standby is and what it does. After all, it never hurts to learn something new or refresh your memory, right?
When you are away from you computer for long periods of time, the default mantra is to turn it off. This works well, however when you want to go back onto the computer, you will have to boot up, log in and wait those everlasting five minutes for the computer to even become responsive to your barrage of demands. To solve this unending pain in the neck, we look to system standby to help us out.
In a nutshell, system standby puts the computer to sleep. It is still alive, but not doing very much. Electricity usage slows to a trickle, monitors and other hardware gets turned off or switched to a standby mode, and anything you were doing gets saved to short term memory. Then, when you need to get back into the computer, the system will wake up and be up and running in a fraction of the time it took to turn back on from a shut down. However, this great ability does come with some unexpected downfalls.
When system standby is used on a laptop, you must be sure that you will have enough energy to keep it sleeping; if it were to run out of electricity, any data that was being saved in memory will be lost since the data is saved in volatile memory. Volatile memory only holds onto data when there is energy keeping it running. Take away the juice and you can say goodbye to your data. However, if used correctly, that is for shorter period of non use, system standby is a great tool.