If there's one constant, it's change. And the more things change, the more the stay the same! Case in point, the new iPhone 5s. With all the new bells and whistles, like the 64bit CPU, the slow motion camera, and the Touch ID fingerprint reader, Apple has had to simultaneously enhance battery technology to keep pace. This allows Apple to maintain battery life, despite the increased demands of the new hardware. But I'm not satisfied with that. Imagine if Apple could keep the hardware unchanged, and just apply that new battery technology to the existing device. They could double the battery life!
The best part is, these are not hard-to-find, proprietary batteries. iBattz has adopted the standard 2200mAh i9300 batteries found in Android phones. Those batteries are $15, or for $25 you can get a spare battery and USB charger. In theory, you could keep a stash of pre-charged batteries and be ready for anything!