How long does the iphone 4s batter last for, without using it at all?

How long does the iphone 4s batter last for, without using it at all?

Depending on what task are running in the background on start up, as well as weather you are on 3g or Wi-Fi then typically around the 150 to 200 hours of standby time.

If you want raw endurance then put it into airplane mode but this is essentially the same as turning it off since you are neither using the phone nor able to receive phone calls and text. Next best thing is to connect it to wi-fi, or flat out disable data connection as 3g will slowly eat up a battery while the phone is not in use. Wi-Fi will as well but at a much slower rate since Wi-Fi radios require less power than 3G.

Built-in rechargeable lithium-ion battery
Charging through the computer's USB port or power adapter
Talk time: up to 8 hours using the 3G network;
2G (GSM) network for up to 14 hours
Standby time: up to 200 hours
Internet use: Up to 6 hours when using 3G networks;
WLAN network up to 9 hours
Video playback: Up to 10 hours
Audio playback: Up to 40 hours

FROM GLYBY