LONDON: Always have to carry your smartphone charger with you? You can save a lot of battery life by just tinkering with your device's settings.

Mobile devices have a large number of different adjustable system settings - such as screen brightness and network connectivity - whose energy impact can be significant, finds a new study by the University of Helsinki researchers.

The research by Finnish computer scientists is based on a large dataset that consists of device usage data gathered from over 150,000 smartphones and tablets.

Some of the main findings of the study were: Wi-Fi signal strength dropping one bar can cause over 13 percent battery life loss; automatic screen brightness is in most cases better than the manual settings; high temperature can cause even 50 percent battery life loss, and high temperature is not always related to high CPU load.

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