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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.
Quick Answer. The average lifespan of a car battery under normal conditions is four years. Normal circumstances require full charge cycles and limited exposure to any extreme temperatures. Additional devices such as MP3 players and GPS also deplete the life of a battery. Continue Reading