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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.
Updated: 05/09/2017 by. After the laptop has gone through a full single charge and the power adapter is unplugged, the average life of a laptop battery can be anywhere between one and six hours. This time is dependent on the battery, its capacity (mAH), what's being done on the laptop, and how old the battery is.