I left my nissan sit down for 3 mounts and now dont start without jumping cables, I try to charge the battery but still the problem, I did check the battery and its 12v positive... advance auto park check and told me the same I need to replace the Alternator

Alternator and Battery have been replaced, yet battery lights come on, the engine stutters and turns itself off.

“It started with the battery light coming on. I replaced the battery and the alternator. Now the battery light no longer comes on, but all the other dashboard lights do, and the problem still persists. While driving, I lose power: the RPMs go up but the vehicle won’t accelerate. Multiple systems stop working (radio, A/C, power steering, etc.). If I turn the vehicle off for 30 minutes or more, the issue goes away, but it returns sporadically. Sometimes after restarting, the dashboard lights are off but it still won’t accelerate. ”