My battery is new,
The starter is new,
The alternator charge very well.
Sometime my car don't want to start. The battery is completly discharged. All lights are off ( inside and outside ), the radio off; all is off. I boost my car and it start. I have the peace for 2 days, 1 week...
Battery drains can be time consuming to find. First try every single electrical device (bulbs, motors, etc...) & see if anthing doesn't work. Start there.