Samsung is unique among smartphone manufacturers in that it not only produces its own System-on-Chip (SoC) designs, such as the Exynos processor that’s found in some of its handsets, but it is the only phone maker that performs its own battery tests. Unfortunately Samsung, that differentiating trait recently blew up in its face, figuratively

Source: Hot Hardware – Samsung Tested Galaxy Note 7 Batteries In-House While Competitors Used Third-Party Labs