A recent BBC study challenges the belief that using dark mode on smartphones extends battery life. It revealed that 80% of users who switched to dark backgrounds adjusted their brightness higher, leading to increased power consumption. This finding contradicts earlier lab studies, which showed significant energy savings in dark mode. Experts emphasize that actual user behavior often undermines theoretical benefits, suggesting that simply lowering screen brightness remains the most effective strategy for extending battery life. This research aligns with the BBC’s sustainability efforts aimed at reducing overall carbon emissions by 2050.
The surest way to lengthen battery life is to reduce screen brightness. Lowering brightness can halve energy consumption compared to a phone kept at maximum settings.
Some of the most common recommendations are overly simplistic. In the case of dark mode, some people end up using more energy.
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