iPod touch Time and date resetting itself

[Bishwasher]

Just turned my iPod Touch 4th Gen (which now feels rather old and insignificant compared to my iPad 3 and iPhone 5 but never mind) for the first time since updating it to iOs 6 about a month ago to find the time and date had reset itself to say 01:37 on 1st January 1957 anyone have and idea why this happened or how to stop it happening again?

Thanks

 

[Intell]

The only reason why it would do that is if the battery completely died or it was disconnected.

 

[Bishwasher]

It was out of battery, but it's run out of battery before and not reset itself.

 

[Intell]

I'm not talking shows the red empty battery symbol on the screen, I'm talking not even a bit a charge left in the battery. Not having any charge in the battery so that the clock resets is not good for lithium batteries. They should never be run done past 5% of their design capacity. Doing so can damage them and reduce their operating life.

 

[Bishwasher]

My bad, thanks for the advice. Must get Siri on my iPhone 5 to remind me to turn my iPod off next time I use it so this doesn't happen again.