Abatt has charge but car will not start+ - BMW 2008 328 i

have a load test done on the battery as it appears that you have a dead cell. Check the charging rate and if it is not around 10 amps then the battery may not charge at all

Do you mean that the charger doesn't start the car? Have you waited long enough for the charger to charge the battery? Sometimes it will take a long time. A battery will lose its efficiency up to 60 percent during cold weather. That means it will take even longer to charge up the battery for a start. Especially if it has been sitting for a long time. Remember, to start a car with a battery charger, the battery must have a partial charge. Put your battery charger in the low setting of "2amps" and allow it to charge for a dozen hours. If it doesn't start the care by then, you better have the battery tested. It may not be able to hold a charge. Which could keep it from starting the car.

Your starting problem may be battery charge level. Take buy a auto parts store, most will measure the battery charge condition and may recommend a new battery, They will also measure the status of the charging system, which if not adequate, will contribute to the poor battery charge and starting problem. If the battery condition is good or very good, you may have a Starter solenoid or starter and solenoid problem.

firstly check that your battery has a charge using a voltmeter, it needs to have 12v
if no charge, you will need to charge the battery.
if it has a charge, and the battery terminal connections are good, you will be looking for the the engine to turn(attempt to start)
if it turns and stasts, fine.
if the engine does not turn, you will need to look at the startermotor connections. (power supply to the starter motor via the ignition switch turns the engine)
hope this helps

You can charge it through your computer. If you connect your satnav to your computer with the mini USB lead it will charge. A full charge takes about 8 hours.

You can charge through your car cigarette lighter socket either. This takes around 4 hours. The first charge should be continuous until it's charged so you might be better using your computer. After that if you plug it into the car it might be enough to keep it topped up depending on how much you use it.

NOTE: Don't start the car with the satnav plugged in. Unplug it first and when you've started the car plug it in then as there may be a surge of power when the car starts which has destroyed many satnavs.

probably the alternator, when you replaced the battery it had a full charge and once the vehicle used all that charge up and it wasn't charging it could no longer start the car anymore. If your battery light is on in the car it is a fairly certain sign that the alternator is not charging. Generally an AVR test is the best way to check the alternator, but if you can jump start the vehicle, connect a voltmeter to the battery it should be around 14 volts when the vehicle is running and around 12 volts when the vehicle is not running. If it is not at 14 volts when it is running, it is not charging.

Suspect your battery won't hold a charge as it did when new. As they age, from repeated discharge & charge from normal start and stop, over time they don't charge as deeply. I think this is your problem. You can verify by charging it up, and taking car to local Autozone, Advance or any good auto parts store and have them load test your battery, that'll confirm or not. While there have them test your charging system - they do both FREE

THERE IS A SENSE CABLE CONNECTED TO THE ALTERNATOR, UNPLUG THIS CABLE AT THE CONNECTOR THEN START CAR, IF THIS DOES NOT HELP , IF THE CHARGE WARNING LIGHT COMES ON WITH THE IGNITION , BUT IS SLOW TO GO OUT WHEN THE ENGINE IS STARTED , THIS MAY INDICATE AN IMPENDING ALTERNATOR PROBLEM IF SO REFER TO AN AUTO/ ELECCTRICAL SPECIALIST.

This is caused by the Alternator. Also, Check the Belt for Tightness.