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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.
At higher than normal operating temperatures, for every additional 15Â°F (8Â°C) battery life is decreased by 50 percent. Therefore, continued operation at an average cell temperature of 92Â°F (33Â°C) will reduce battery life to 50 percent of that typical at 77Â°F (25Â°C).