After saying the magic words, the 43-gram, 4.7" x 1.9" x 0.13" battery mystically lifts off the rear case enclosure.

In line with rumors, the battery is rated at 3.82 V and 11.1 Wh of energy, for a total of 2915 mAh—nearly double the capacity of the 1560 mAh unit in the iPhone 5s, and slightly larger than the 2800 mAh burner in the Galaxy S5.

Between the larger battery and improvements in power efficiency, Apple touts a talk time of up to 24 hours on 3G, and 384 hours of standby time.

The battery found in the Plus is larger than the standard iPhone 6's 6.91 Wh, 1810 mAh battery—which explains the longer life, despite the much larger screen.