Sometimes turning off Wi Fi can save battery, but it depends on what your phone is doing. It is not always a huge difference.
Does turning off Wi Fi save battery?
TL;DR
Sometimes. Turning off Wi Fi may save battery, but it is usually not the biggest battery drain.
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If Wi Fi is on and constantly searching for networks, turning it off can help. This can matter when you are away from trusted networks.
At home, Wi Fi often uses less power than cellular data, especially if cellular signal is weak.
For real battery savings, screen brightness, poor signal, video, games, and background apps often matter more.
Turning off Wi Fi can help in some situations, but it is not the magic battery button.
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