mobile is not getting charged more than 5% its 4s i have not updated the mobile recently will it may be the issue?

Try the trouble shooting described here:

If your iPhone, iPad, or iPod touch won't charge - Apple Support

I'd start with restarting and force restarting the iPhone: Restart your iPhone, iPad, or iPod touch - Apple Support

and then try the other measures outlined in the support document.

As its a 4S it's several years old, and may need a new battery. Get the app Battery Life to test it, or take it to an Apple store where they can test it and replace it if needed.