Tips and Myths About Extending Smartphone Battery Life
Tips:
Auto brightness
Block powersucking ads
Tweak email settings
Play downloaded music instead of streaming
Turn off wireless when reception is poor
Check battery usage lists
Disable unnecessary location tracking
Shut off unnecessary push
Myths:
Close unused apps
Always use wi-fi over cellular
Let Siri & Google listen for your commands
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Source: Tips and Myths About Extending Smartphone Battery Life – The New York Times