Shouldn't drain the battery in such a short time if all is in good condition.
A week is about the time it takes a radio left switched on to discharge a battery. I once encountered a cd auto changer unit that remained switched on unless the radio was switched off several seconds before the ignition was switched off. As the owner insisted on relying on the ignition killing the sound because she couldn't afford the extra time it took to do it properly, a flat battery wasn't unusual, fortunately the husband owned a battery charger.
Another time was an owner insisted on fitting a Sony car stereo and thereafter suffered flat batteries. The stereo was unsuitable without modification to the vehicle wiring.
Before you start searching for complex answers I strongly suggest you go through the obvious answers, including the battery health and the charging system...
Answers & Comments
Shouldn't drain the battery in such a short time if all is in good condition.
A week is about the time it takes a radio left switched on to discharge a battery. I once encountered a cd auto changer unit that remained switched on unless the radio was switched off several seconds before the ignition was switched off. As the owner insisted on relying on the ignition killing the sound because she couldn't afford the extra time it took to do it properly, a flat battery wasn't unusual, fortunately the husband owned a battery charger.
Another time was an owner insisted on fitting a Sony car stereo and thereafter suffered flat batteries. The stereo was unsuitable without modification to the vehicle wiring.
Before you start searching for complex answers I strongly suggest you go through the obvious answers, including the battery health and the charging system...
No, but if your battery is already weak or failing, it could discharge enough to cause starting problems.