Battery charged but will not start without jump

Hi Kelly, A fully charged battery is 12.4 to 12.6. and when the motors running it's 14.3 to 14.6... Three reasons your battery is flat (isn't charging), You have a faulty battery, A power drain or you have a faulty alternator... Clean your battery terminals and If you don't have a multimeter then Try jump starting your flat battery and driving your car for at least ten minutes then turned the motor off and try starting it WITHOUT jump start, If the battery's still flat then it's the battery, If your car starts straight away but won't start the next day then you have a power drain... If you jump start your flat battery and go for a ten minute drive but during that drive the motor dies without turning off the key then it's the alternator....
A mechanic or an auto electrician can usually test Free of charge if you can get it there....CHEERS..

Check your new battery if it is charged up, sounds like something is draining your battery, or your alternator is not charging properly, check your charging system

If you are sure the batteries are charged up fully but you keep having issues with having to jump start I would double check the batteries after sitting for a while. Could be a problem that there is a short that is running the battery down enough not to work. Could also be your starter is pulling too much juice as if you put a boost with your battery hooked up you are using a lot more power than just your operating battery. Just a couple of ideas.

I would say you never checked to see if the battery is any good

I most likely is dead or below 12.6 volts & you never jump a dead
battery,you try charging it

Jumping is not charging a battery,you need to own a battery charger

If the battery keeps draining or won't hold a charge you need
a new one,then if the problem exists you have someone do a
Parasitic Current Test to find out which circuit is staying on

Dead Battery --Replace it

OLder cars YEs you can jump it without a battery. But in newer cars that use computers and advanced Eltronic ignition/timing/ful injection you have to have power to the cars computer. without a good battery the car will not run.---------------------------------------------------------------------------------
Renault CAN Clip

Just leave the car battery charge up and then unhook the battery cabbles.........It should get enough charge in about 15 min to start without assiestance from jump start,...........Hope this helps.

Check for loose battery terminals. Car will not start without jump because battery is not connected properly. Starter is probably good or car would not start with or without jump. If alternator is bad and not producing current, car would die after running a short while as battery would out of juice and without alternator current the car would die - so probably alternator is good. If connections are all good, get a voltmeter and test the battery voltage - it should be over 12.75 volts. If not, battery is not holding charge.

its the battery. the battery holds the charge and the alternator charges it so when you jump the car it stays running because you alternator is providing power when you shut the car off you have a bad battery that isnt holding the charge needed to start it again.

Check the NEGATIVE battery cable from the battery to the ground pont