Second battery
Scotty:
As I often listen to music while taking a break in the ski resort parking lot, I have experienced low/dead battery situations such that I carry a portable battery/jump system :
https://www.amazon.com/Jump-N-Carry-JNC660-1700-12-Volt-Starter/dp/B000JFJLP6/ref=sr_1_7?s=automotive&ie=UTF8&qid=1472654012&sr=1-7&keywords=portable+jump+starter. The device is effective, but not elegant: takes up storage space, hard to secure, must be separately charged and doesn't increase engine-off battery life.
As engineers strive to increase fuel economy, many automakers set up their cars to only engage the alternator to charge the battery when the engine is not under load resulting in problems due to undercharging the battery (do you coast much?). BMW started replacing batteries yearly at regular service of some of their vehicles (2015 X5 5.0, for example) to cope with the problem as changing the vehicle's charging programming would require costly EPA mileage re-certification and could spur mileage lawsuits.
I too am interested in adding a second battery. Ideally, a two battery system that ran the "infotainment" off one battery while keeping the other functions on the original battery works very well on my boat with and "A", "B" and "Both" switch.
This set-up on the complicated ICTPro multi-media/security system may be too much to ask. The simplest hack would be to put a new battery in parallel with the factory (use a matched battery or buy two new) and install a high current alternator. The difficult part is locating a suitable place to mount the new battery. A good auto sound company should be able to handle the installation with proper wiring, but could impact the vehicle warranty.
I haven't yet taken delivery of my F-Pace. Anyone know of a good location for a second battery (Bentley Continental sites a second battery in a hatch in the "boot")?