One of the key advantages of OLED display panels is that they can turn themselves off at a sub-pixel level while showing any dark or black content. Thus, it was theorized by power users that using a black system-wide theme or a dark theme in apps would end up increasing a smartphone’s battery life. However, there were no hard numbers to back up these claims. That is until today as Google itself has admitted that using a dark theme would indeed help in improving a smartphone’s battery life.
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