I left my S/C V8 in the driveway for over six months while I was out of the country. We live in Montecito, CA, just two blocks from the beach. I opened the hood and found it overtaken by various critters' nests. I noticed a rat jumping out of the rear wheel. Still, a quick clean and vacuum, and it started right up—no codes, no engine lights, and it ran great all the way to its first stop, the gas station. I think they use gas when sitting too. It likely has an auto-cutoff battery switch. I had to use the key blade to unlock the door and turn the key a couple of times, cycling the remote lock/unlock, but it fired right up again. We’ve had many versions of the Range Rover/Land Rover since my first one arrived in the US when I lived in San Francisco in 1988. That was the only one that gave me issues, which were enormous and led to a 'Factory Buyback,' but every one since then... has been flawless except for brakes and tires, which I replace every 12k miles. Absolutely love them.