20 - 30 Minuten
My Iphone 3GS was getting depressed, it was dying at 60%, and couldn't keep up with my Insane IG camera apps. SO I ordered a new one, the phone was sad to see it power source leave... :(
After a complicated, but life saving surgery my Phone 3GS emerged anew, alive and brilliant running off a whole new power source...
Don't tell your 3GS it isn't the same battery, it makes the painful process that much harder...