After a jump-start, your car should run fine if the only problem was that the battery was dead. The jump-start provides a boost to get your car started. Once you’re driving, the alternator will recharge the battery. However, if your battery is old, damaged, or there are other issues with your car, you might still experience problems. If the battery was dead because of something else, like a charging issue or a faulty alternator, you might need to get those problems fixed. It’s a good idea to have your car checked by a professional if you continue to have issues after a jump-start.