If your vehicle is showing need to jump-start the car frequently, here are the most likely causes and the parts you'll need to fix each one.
The battery has aged and lost its internal capacity to hold a charge, especially overnight or in extreme temperatures.
Corrosion buildup or loose clamps prevent the alternator from fully recharging the battery and restrict power flow to the starter. This is a very common installation error after a recent battery replacement.
The alternator is not generating enough electrical current to run the vehicle's systems and recharge the battery while the engine is running.
An electrical component, such as a stuck relay, interior light, or control module, remains active after the vehicle is turned off, slowly draining the battery overnight.
The belt driving the alternator is stretched, glazed, or lacks tension, preventing the alternator from spinning fast enough to adequately charge the battery.
A worn starter motor can bind internally, drawing excessive amperage that mimics a dead battery. It may only turn over when given the extra voltage boost from a jump-start.