A user reports that their smartphone is losing charge much quicker than when it was new and is concerned about the device's battery health. The device is slightly over a year old and there have been no recent drops, damage, or exposure to water. As a technician, what is the most likely cause of the diminished battery life and what action should you take to resolve this issue?
Guide the user to recalibrate the battery by completely draining and then fully charging the device.
Perform a factory reset to resolve any potential software issues draining the battery.
Suggest installing a battery-saving app to optimize the device's power consumption.
Recommend and arrange for a battery replacement for the mobile device.