Been weighing this one up since picking up an S4 recently. Previously had an S2 with an extended battery and it's handy having a battery last you a day and a half, however I like to use clip-on controllers for games (iControlPad) which the extended batteries make awkward. Same for other accessories.
Think I'm gonna just go with a spare battery and charger. As mentioned it's the possibility of having to swap versus always having a beast of a phone in your pocket. Most days a standard battery easily gets me to work and back and through the evening, and the odd time I'm on the train or out the house all day it takes a minute to swap batteries.
Cheers for helping me decide guys. Any standard-size batteries and chargers you'd suggest or just stick with Samsung ones?