Hey. My iPhone 4s is now 20 months old. As it stands, Apple doesn't currently make an iPhone that's too appealing to me, so I'm holding onto the 4s for a while yet. Do you think my experience with it would benefit from a new battery? The battery runs down quicker than I'd like during a typical day but I guess I'm a heavy user of location services and music streaming. My question is more a general: Will *any* iPhone benefit *significantly* from a battery replacement after 20 months? I forget at this point what I should be reasonably expecting in terms of battery life. Thanks very much folks.