Can Key Fob Drain Car Battery. Test 2 - I disconnected the 12V in the Prius it read 1258VDC and then put a new battery in the second fob and waited an hour or two. The reason for this difference is that the smart key fob also has a receiver and has to communicate with the car more often when its inside or near the car.
If you have a weak cell or cells not accepting a full charge either you are not driving the car enough to fully charge up your battery or your less than a year. The battery died on my wifes 2016 Outback today and after cruising some forums I noticed someone mentioned that leaving the key fob in the car or even storing it near the car can cause a drain on the battery as the fob is constantly communicating with the car computer. Can a key fob drain a car battery.
The other option is either you by any case confused the key fob with the standard key which is only to unlock the doors.
Do electronic key fobs drain your car battery. The key fob does not drain a battery. For that buy a new fob with the innards and dig out your chip from the old key and glue it into the new one. If you have a proximity key the kind where all you have to do is walk up to the car with the keys in your pocket they can.
