Q: My iphone 4s overheating and the battery is drained so fast

Hey Ahpanz,

Welcome to Apple Support Communities.

If I understand correctly, you're concerned about the battery in your iPhone 4s because the device is getting warm and the battery is draining quickly. This article provides a lot of great information about operating temperatures and temperature management that's built into iOS, which should help you resolve the issue with the device getting warm:

Keeping iPhone, iPad, and iPod touch within acceptable operating temperatures - Apple Support

The webpage below provides a lot of great information that can help you resolve any issues with charging iOS devices or improving the battery life of iOS devices.

Batteries - Maximizing Performance - Apple

So long.