I can sympathise, Henry.
I got in the car on Wednesday morning about 0730 to head off on the weekly shopping trip, turned the key and the the car gave a groan as there wasn't enough power in the battery to turn over the engine.
I only use it once a week for shopping and if there are no hospital or GP trips for Dad that's just twelve miles a week.
During the winter I'd charge the battery the day before use but it was becoming clear that it was on its way out.
Anyway decision made, parted company with £86 ($112) for a new battery and was back on the road later that afternoon.
I used my time wisely and defrosted the freezer instead of trudging around Tesco.