My iphone 3s is connected to find my device app and icloud acoount and it is connected to internet by 3G or wifi but when i use find my iphone it seems always offline and sometimes when i use the app from other device the battery level shows normally

Morning Betta123,

Thanks for using Apple Support Communities.

For more information on this, take a look at this article:

iCloud: Troubleshooting Find My iPhone, iPad, iPod touch, or Mac

http://support.apple.com/kb/ts4006

"No location available," "Offline," or "Location Services Off" alerts
This can occur if:

• The date on your device is incorrect. This can be set in Settings > General > Date & Time.
• Your iOS device is currently off or not connected to a data network (Edge, 3 or 4G, or Wi-Fi). Wait a few minutes and try again.
• Your iPad (Wi-Fi only), iPod Touch, or Mac is currently off or not connected to a Wi-Fi network.
• Location Services is not enabled on your iPhone, iPad, or iPod Touch in Settings or on your Mac in Date & Time preferences. Learn more about Location Services on your Mac with OS X Lion or OS X Mountain Lion.
• You are located in a country where Apple does not offer this feature. This feature may not be available in all countries due to technical limitations or local law.

Best of luck,

Mario