What the jump actually did
A jump start doesn't charge a battery. It lends the engine enough power to start, and from there the alternator takes over. If the battery was drained by one forgotten dome light, a long drive can bring it back. If it was drained because it is worn out, nothing about the jump changed that.
That is also why the car can seem fine for the rest of the day. While it keeps running, the alternator carries the load. The real test is the next cold start, hours later, when the car has to start on the battery alone.
The battery can't hold a charge
This is the likeliest answer. A battery that is three or more years old, that has been through a Texas summer, and that went completely dead once, often won't recover fully. It takes a jump, runs fine all day, and is empty again by morning. A car that starts fine right after a drive but fails after sitting overnight points here.
Draining a battery all the way down does lasting harm. Lead plates left drained build up hard crystals of lead sulfate, and that buildup often can't be fully reversed. It is why a battery that has been dead once is rarely quite the same afterward, and why one that was already old often doesn't survive it.
The alternator isn't putting enough back
If the car died while you were driving, or the battery light came on, suspect the charging system. The jump got the engine going, but nothing was refilling the battery, so it ran down again. Replacing the battery won't fix that, and it needs a repair shop.
Something is draining it while parked
A light that stays on, a door that isn't fully latched, or a gadget wired in after the car was built can empty even a good battery overnight. Look around the car at night for glowing lights, and unplug anything left in the sockets before you try again.
If the battery is healthy and the alternator is charging, a drain is what is left. Some are easy, like a trunk light that never goes out. Others are electronic modules that don't go to sleep, and those take a shop with a meter to find.
Why a second jump isn't the answer
Every time a lead-acid battery is drained all the way down it loses some of its life, so a second jump on a battery that keeps dying brings it closer to the end. Ask what happened. Did it die while driving, or only after sitting? Did anything stay on? How old is the battery? If it is old, replace it.
If a battery is the answer, replacement is $239–$255 for eligible vehicles and batteries, with the installation covered, plus the $19 dispatch fee, charged once. If you need a jump just to get moving first, that is $49–$75, plus the same fee. Tell dispatch it is a repeat, and they will confirm the battery that fits your car and your total before a driver is sent.
Common questions
A healthy battery that was drained by something obvious should start the car normally the next day after a good drive. If it doesn't, the battery is damaged or something else is wrong.
A proper charger fills a battery more completely than driving does, and it can bring back a battery that was drained once. It can't bring back one that is worn out.
That is the likelier cause. Once the engine is running, the car depends on the alternator. If it dies on the road, the alternator isn't keeping up.

