I'm pretty satisfied with my 2 year old s9 plus battery life : r/GalaxyS9
Galaxy S9 battery life isn't as good as we had hoped - CNET
The Samsung Galaxy S9 and S9+ Review: Exynos and Snapdragon at 960fps
How to fix Galaxy S9 battery life problems | Android Central
Galaxy S9/S9+: How can I extend the battery usage time? | Samsung Levant
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Samsung Galaxy S9+ Review > Battery Life | TechSpot
7 ways to increase battery life on Galaxy S9 and S9 Plus
Galaxy S9 and Galaxy S9+ battery capacities confirmed by parts retailer - SamMobile - SamMobile