How fast do the defective iPhone batteries die?

I'm just wondering what would be considered normal battery life/charge time and what would be considered defective battery life/charge time? I'm not sure if I'm affected or not?

I'm only charging my phone at night and I'm using it all day long. (I have an iPhone 5)

FunctionThe alternator recharges the battery once it is used to start up the car. A faulty alternator will cause the car to drain the battery power. WarningStarting and stopping the engine within a short time span will cause the battery to eventually die. The alternator on average requires 20 minutes with the engine running to fully recharge the battery. EffectsLeaving any lights on while the car is off will drain the power from the battery. Electronic devices within the car like the stereo or a DVD player will do the same. GeographyA battery can fail from extreme temperatures as it causes a problem with the chemical reaction needed to generate the power. The insulated jacket most batteries are encased in can prevent this. Prevention/SolutionHooking up a second battery for the car's other devices will increase the life span of the starter battery.

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