Wizard, thanks for that picture. I was finally able to get a close to accurate measurement of my battery, as best as I can without a physical ruler, and I do have the 650.
Way too much trivia, but a dollar bill is 6 1/6" long and you can fold a dollar bill - I've used money to measure noncritical stuff lotsa times
Back in the '70s I learned that five quarters weigh exactly one ounce and a nickel weighs exactly five grams. I won't share how I learned this, though