Other Mr2 battery/alternator doesnt work!

Other, start, battery, fine, drive, alternator, light, runs, cranks, guys, driving, washing, dash, board, completely, started, compression, traffic, oreillys, tested, charging, months, back, wash, park, barelllyyyy, jump, work, battery/alternator, normal, minutes, shut, starts, pull, sloowwlllyy, replace, dead

Hey guys, so I really need some help, the other day, I was driving my car, it was fine, then I park it, wash it, try to start it back up, it barelllyyyy cranks, cant even start the car, then I jump start it, its fine, runs normal, I go drive it, pull over, again try to start it, wont start, just sloowwlllyy cranks, like a dead battery, I replace the battery with a new one, runs fine, next day, I drive it, then after about 30 minutes of driving, I shut off the car, then try to start it, wont