Tell if my iphone battery is giving normal backup?

Ok i just tested i set screen brightness to full and start browsing on 2g gprs, it gave me
2.15minute per 1 percent drainage
Is this normal?
All location services, background apps, push notifications were off.

I get 7.5 spsh prr 4.86 mnsi and then there's 76.462 jkal and then 57.6 mhab.

I phone's battery backup is worse… Even i need to charge my 4S within11 hours.
and this is not normal…2.15 minutee/%. Get it checked

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Cheers
Kush Kaushik

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