This version of the Note 4 ships with 32GB of onboard MLC flash memory. About 25GB of that space is available after Samsung installs the operating system and its own suite of software.
The Note 4 writes data into its flash storage array nearly as quickly as it reads it, according to these simple tests. As a result, the Note 4's storage subsystem is one of the fastest ones we've tested overall. Still, its 204MB/s average read speed isn't anything to write home about.
We tested battery life in four different scenarios. In each case, the phones' display brightness was set to 180 cd/m² before starting, and display auto-brightness features were disabled. Our workload for the web surfing tests was TR Browserbench. The video test involved looped playback of a 1080p video recorded on one of the phones, and our gaming workload was the Unreal Engine-based Epic Citadel demo.
I'd say the iPhone 6 Plus has a slight edge in our battery life results, overall, versus the Note 4. Both of these "phablets" have exceptionally long run times, though.
Keep in mind that the 6 Plus has a 2915-mAh battery, while the Note 4's battery capacity is a tad higher, at 3220 mAh. Then again, the Note 4 has to drive a slightly larger display with substantially more pixels. The fact that these two devices are so closely matched in our run time tests speaks well of the Exynos 5433 SoC.
The fact that the Note 4 reaches nearly six hours of run time in our gaming test, with Epic Citadel, is an indicator that its Mali-T760 GPU is reasonably power-efficient, too.