So iPhone 4S battery drain is hardware?

according specs, iphone 4s has 100 hours less standby time iphone 4. ( iphone 4 has 50% more battery life in standby ). , after 2 months+ months, nothing has changed in battery life?

shouldn't hope on ios 5.1 fix battery issues?

 

you know battery not bad @ evo.

 

Forums iPhone, iPad, and iPod Touch iPhone iPhone

• iPhone
• Mac OS & System Software
• iPad
• Apple Watch
• Notebooks
• iTunes
• Apple ID
• iCloud
• Desktop Computers
• Apple Music
• Professional Applications
• iPod
• iWork
• Apple TV
• iLife
• Wireless