2004Jeep liberty

maybe try finding the starter or alternator ground. my mothers car battery kept dying and preventing start because her alternator ground not working and not recharging the battery. usually you can find ground locations through autozone repair help or downloading the manufactur repair manual. you could also follow the wires going from parts to find the grounds for them. usually engine grounds are around the outside area of the engine on the metal body of the car. they look just like a wire ending with a loop and a screw in it at the end. try looking deeper into the sides as the lower you get the more prone they are to rust and corrosion from splashing from the ground water. personally i would check the battery volts and alternator volts because theyre easily done with a multimeter. also another simple thing to check is taking the battery terminal posts off, cleaning them with a brush, and putting them back on tight.