Samsung’s newest Android-powered flagship smartphones have received mostly positive reviews, but Forbes contributor Ewan Spence pointed out that the Galaxy S7 has “issues around performance” and the “changes are merely iterative, without any new vision.” In this article, the focus will be on the Galaxy S7 battery performance in comparison to other smartphones.
The battery in the Galaxy S7 is 3000 mAh. Since the Galaxy S7 edge is larger, Samsung was able to fit a 3600 mAh battery into the curved variant. This is substantially more than the 2550 mAh battery in the Galaxy S6 and the 2600 mAh battery in the Galaxy S6 edge. Despite having a larger battery, the Galaxy S7 actually has an inferior battery life compared to its predecessor, according to Phone Arena.
Phone Arena designed a strenuous custom battery life test to determine how long phones last before requiring a recharge. The Galaxy S7 lasts 6 hours and 37 minutes. Under the same test, the Galaxy S6 scored 7 hours and 14 minutes. “Considering the larger cell of the Galaxy S7, it’s a bit weird to see such a notable delta,” said Phone Arena in a blog post. The tested Galaxy S7 was branded Verizon and contains a Qualcomm 820 chipset rather than the Exynos. Phone Arena set the brightness to 200 nits on every device it tested and ran the same script that replicates real life usage to be certain of uniformity. 
The good news is that it doesn’t take long for the Galaxy S7 to fully charge. It takes only 88 minutes to fully charge the Galaxy S7 — which is only ten minutes more than the Galaxy S6 and should not be surprising since the mAh is much larger in the newer Samsung flagship.
How does the battery life on the S7 compare to other smartphones? In terms of battery life hours and charging time, here is a comparison of the devices:

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