Gee_Ell

Thank you very much for this blazing fast reply. Any suggestions on the appropriate battery charger?

Greetings everyone, (This is a noob question! However, since I have not yet found a decisive answer I turn to the community. Please direct me to the correct post, if it exists! ) Carrera 4S 2008, 997.1 was put on hazards for 24 hours. Afterwards, it appeared the battery was dead as hazards had gone off. Remote unlock was non-functional. I plugged in the CTEK trickle charger ("car mode": 14,4V / 3,3 A) in the cigarette igniter. The car immediately exhibited the following behaviors: -hazards lights flickering regularly, at approximately 3-4 Hz -hazard button flickering at the same pace. -Sport chrono's hands waving around erratically I left the car in that state for 5-7 hours. After that period, I pressed the hazard button and the flickering stopped. I assumed the car was now charging. Coming back to it 10 hours later, I unplugged the trickle charger; the battery was still dead. I replugged the trickle charger, on car mode, and the flickering resumed. I gave it 12 hours. This morning, I observed the flickering was still on. I tried to turn on the engine, to no avail. The car key remained locked in the ignition. I could not pop the hood in order to obtain a voltage measurement from the battery's poles. My hypothesis is that the electrical system is in a faulty state and needs a hard reset, before charging can occur. Perhaps I also need a different piece of equipment. Any help... HELPS!