If you have checked the owner's manual (if it is still with the vehicle) and there is no radio code card (looks like a credit card), and it is not there, then you will need to contact the dealer, and provide the VIN # and proof of purchase or title (so that they know you own the vehicle and the radio or vehicle is not stolen).
The battery may have a dead cell and need replacing. You may also have some light that is on or a relay that is stuck.
A car battery would keep dying because inversely, the lesser the battery is used, the dying process continues. The more the battery is used, the lesser the dying process. But the dying commences and continues , the moment the car engine is not used. Thus, as often as the car is being used, the dying "resumes" the moment tne engine stops. And the faster it is used again, the slower the dying process.EVerytime the car engine is used, the battery recharges, thus life is given back to the battery. Once the engine stops, the dying resumes. This is why the car battery keeps on dying (everytime the car engine is not being used)
your battery is dying or is dead
Either the battery has a dead cell and needs replacing, or alternator is defective, loose or corroded battery cables, or something is draining the battery. Look for a courtesy, trunk, under hood, glove box light that is on. Also can be a defective brake light switch which causes the brake lights to stay on.
Your battery is probably dying
that means the battery is not good
When you see any sign the old battery is dying.
Your battery is slowly dying.
A fully charged battery is designed to maintain the parasytic load on an idle vehicle for 21 days. After that period (in most cases) the battery will have been drained and will require either charging or replacing.
I have a 2001 Intrepid and my battery kept dying, so 2 tow trucks later I found out that the battery that was in my car had over heated and battery acid was leaking. After that all I had to do was replace the battery and everything is well. Hope this helps!
It may be that your battery is old. Rechargeable batteries work best when they're allowed to completely 'die' before recharging. Most people don't allow that to happen (me included !) - and thus the battery's life is shortened.
Dead cell in battery or something is on pulling power from the battery.