So i have a 2010 TL-SH.I noticed a few weeks ago when starting my car it was becoming slower and slower like the battery was dying,but it usually started.Last week i left my house my car started up no problem.Stopped for gas and with the motor off for not even 5 mins i couldnt even get her started.Needed to call someone for a jump.So the last few days its gotten to the point where i need to jump the car,but once its running she runs fine.I decided to do a little troubleshooting yesterday and with the car running the battery was reading about 14.7 so i believe the alternator is ok.It looks like a pretty old battery.Bought the car over the summer and didnt notice the shit battery.Its one of them old batteries you can add water too.Today is when i really noticed an issue.I jump the car and it turns on for a second then dies.Ive tried several times over the last few hours and cant get it to stay running.It runs for seconds then shuts off.I have gas and hear the fuel pump priming.Tried disconnecting the air sensor and still nothing.Any ideas? I am past my oil change date but theres oil in the motor.Driving myself crazy with this.Even if it was just a bad battery i would assume with a jump it should still run so idk

 

Change battery first, because it is dead anyway. Jump starting frequently is not good for your car. Change battery

 

when a lead acid battery is discharged you can almost never get it back to a full charge. Your battery has been run so low it can't even hold the power for starting. Replace the battery and make sure there is enough oil in the car too. Also make sure you unlock the car with the key in the door before you change the battery. It could be the security/immobilizer system cutting off power to the car.