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, Mobile Phones Marketing Professional. The average smartphone (powered by a 1500mAh battery) will have a normal battery life of around 10 to 14 hours depending on the usage you have. The main drains will be: screen, data connection, games, music and voice usage. Views Â· View Upvotes.
So, for example, if Battery Life is the only running App, and the battery is discharging at 125mA, a fully charged battery with a capacity of 1400mAh should last more than 11 hours, at that rate. If you turn on Airplane mode and minimize brightness, the phone should use about 100mA.