Depends how old the iPhone is. For some, it's 8 hours average. For other's, it may be only 10 hours standby time and only 4 hours gaming time because its a really used one.
However... Apple boasted that:
"...the 3GS can last for up to ten hours of video, nine hours of web browsing on Wi-Fi, twelve hours of 2G talk time, or five on 3G, 30 hours of music, or 300 hours of standby."
Whatever the case, the iPhone 3GS is powered by an internal 3.7 V 1219 mAh rechargeable lithium-ion polymer battery.
full charge:
Usage: 6 hrs 50 mins
Standby: 1 day 19 hrs
full charge:
Usage: 7 hrs 08 mins
Standby: 1 day 15 hrs
full charge:
Usage:4hrs
Stanby:2days 25mins
It really depends on how much and how long you use it and it if has energy saving settings or not.
About 11 minutes
it last for 240 hrs on stand-by,means when the phone is on sleep mode.Also it last for 8 hrs on talk time 3g/3g
Depends on what you are doing on your iphone
if it is fully charged 7-10 hours
it lasts as long as a dell latitude e6250 battery lasts
Until ones iPhone is charged.
depends what type of battery and how much shots you take
About 2 days
I think the walkman battery lasts about 12 hours when fully charged.
if your playing time is a period a day it could last for about...i mean around 2 to 5 days, at least thats how long mine last.
When new and fully charged, the battery provides up to 8 or 12 hours of battery life
it depends on how bright the back light is also if ur using wifi mode