Once again, I have bought the wrong battery, due to being completely unable to remember — at the store — whether my bike takes a 12-BS or a 12A-BS. Hint: it’s the latter. The only difference is that the 12-BS is about 1/8″ taller, and just won’t squeeze in. Rarrrr!
Luckily, I noticed before opening up the battery, so I can return it to the store tomorrow for the right one. Sigh.