Hey All,
This will be my first season hunting while owning an iPhone. I know I'm not unique in that I stay in my stands from before sunrise to after sunset without getting down midday. Where I hunt generally isn't cell phone friendly and eats batteries. With previous phones I would always carry an extra battery to swap out once one has died. Obviously with the iPhone this isn't an option, which almost made me wait for another option (Verizon). What do you all use for a battery backup with the iPhone that will keep it alive and functional all day?

Thanks,
R