5 ms·
> I've got a brand new Kia. The FM radio comes on so fast, it's surprising. Every car I've ever had always has had some sort of warm up time or a splash screen
by jhoechtl 5y ago
> I've got a brand new Kia. The FM radio comes on so fast, it's surprising. Every car I've ever had always has had some sort of warm up time or a splash screen on the infotainment system while it's booting up
They simply never power of the Head Units, even if they go dark. And I am not talking of the constant power feature head units head since forever but the CPU actually doing stuff. Most of the time the satellite data is held fresh to give you an immediate position fix if requested.
If you completely detach it from power you would notice that there is a startup time.
- iainmerrick 5y agoDoesn’t that run the battery down?
- xattt 5y agoManufacturers must be able to do this because of higher capacity glass-mat batteries and low power CPUs.
- op00to 5y agoIt does. I have a Subaru with a head unit that stays powered on, and it has ran itself down more frequently than any other car I've had. The explanation I got from the dealer was that the residual drain on the battery is much higher, so there's less capacity to start the car. I keep a lithium ion jump starter charged and in the car, and I've had to use it a few times. If you can keep each and every OTHER draw on the battery down, it's fine. The biggest thing that helped was realizing that the battery dies when the key fob was hung up with our other keys. Coincidentally, this was exactly the right distance for the car to constantly wake and sleep itself as it thought the key fob was entering and leaving its vicinity. Between adequate key fob faraday cages, making sure the interior lights are in the automatic or off position, and making sure all the doors are closed we haven't had a dead battery in a while. What a pain in the ass.