Batteries
Your car's battery supplies the electrical current necessary to start your car. A slow engine crank can be an indicator that your car's battery is dying and needs replacement. In addition, your car's check engine battery can sometimes appear when your battery power is weak.
Alternators
Once your vehicle is started, the power supplied to your vehicle is provided by your alternator. A failing alternator can cause lights to dim or flicker. This can include your headlights but also in dash lights. The issues can subside when the vehicle's RPMs pick up.
Starters
If you turn the key to your car and hear a clicking sound, or nothing at all, then it may be the starter. Since this can also be an indication that the battery is dead or weak, Automotive Recalibration Center's team is qualified to diagnose the repair the issue.