The battery drains it self sometimes soon after parking the vehicle. Try starting the car and it is dead, The car starts with Jump Leads. The AA checked it and said that the Alternator is charging the Battery. The car is VW Polo 2007 Model. What could be the problem

When Connecting jump leads ALWAYS Positive first, (Red), Negative last, (Black).
When Removing jump leads ALWAYS Negative first, (Black) and Positive last, (Red).
ALWAYS make sure you DON'T touch the negative to the positive at any time! (Loads of sparks and you risk damaging the battery).
Safest way I have found is this.
With the engine on BOTH vehicles turned OFF. Connect up to the flat battery first, then connect to the good battery. ONLY start the vehicle with the good battery. Wait 2 or 3 minutes to let some charge cross to the dead battery then start the vehicle with the dead battery.
The dead battery will need to be fully charged as soon as possible.

First clean the battery posts, to much corrosion cause cause a no jump start condition. Sometimes a cell or two in the battery is dead. This is why you can't jump start the car. Replace the battery.

This happens sometimes with dead batteries taht have more than one dead cell in them. Disconnect the Positive battery cable and connect the jumper cables to that directly and the vehicle should start provided the vehicle providing the jump has a battery with enough amperage to turn your motor over. If there is a leak in that front adjustable air shock this will happen again because that compressor will continue to run trying to get the proper pressure on that shock.

cheapest thing to start with is to buy a new battery. they arent built to last. if that doesnt help then its your alternator. sounds like its gonna be the alternator though. you can test it with a test light though or some alternator repair shops will look at it for free. it will only take them a minute to do if you feel like taking the alternator in

Most cars have a release button under the steering wheel. It will be recessed and hidden under a plastic plug. You would have to use a long screwdriver to stick in the hole and push on the release button. I think the button releases the gear shift so it can be moved the the park position. It's unusual that you could not jump start the vehicle. I have run into a few cars that the battery was so drained that they would not take a jump until the jumper cables were left hooked up for a few minutes with the jumper car running at fast idle. Since the battery went dead, there may be an issue with the GM anti theft system. Sometimes the security system, will prevent the car from starting, even with a new battery. If it happens, you will have to take the car to a dealership to get the car started. More of GM's faltering engineering.

Hi Anne,
With all vehicles using electronic computer management systems, there is always very low consumption of power from the battery, as these systems are running all the time. However even with those systems running you should be able to leave the car parked for a period considerably longer that one week.

As the AA has confirmed that the charge rate is correct from the alternator, I would suspect the replacement battery. Make sure that the size (The amp hour capacity is correct for your vehicle) If it's too small the systems may drain it during the time indicated....

I doubt very much that you have a short circuits in the vehicle, but to be on the safe side take it along to a shop who have an auto electrician and let them carry out the relevant tests.

I suspect the battery.

Regards Johngee10

Hi, there will be diodes in the generator that are letting the power from the battery drain away through the parked times when not in use. to prove it charge the battery- then disconnect the negative terminal on the battery, connect 24 hours later and see if the battery as kept it charge, if so - fit new alternator, good luck.

It sounds like the battery has a dead cell in it. Replace the battery. If you have an alarm installed remove the in line fuse from the alarm and see if that stops the battery drain.

change battery ,if it starts with jump leads battery flat or altenator not charging