...computer hardware does not always respond well to a prolonged period without power
I've been working in computing for most of my working life, but I only got in to car mechanicing fairly recently. One of the first lessons I learned was that there are very few cars (or machines in general) out there that take kindly to not being used for any great length of time.
My other half's 4x4 ran out it's MOT and sat on the drive for six weeks. By the time I came to take a look at it prior to it's booked text the battery was stone dead. Even once charged, it wouldn't hold the charge for longer than a day. Even over six weeks, the brakes had lightly seized and the discs were lightly rusted. She made a right old clunk when I got her moving again, then I ran her up and down the lane a few times to clean the discs up again.