What is the first thing you look at when a shop hands you a new battery?

I have been reading old posts here for a while, and one thing I notice is that everyone seems to have a different first step when they check a battery, so I want to hear yours. I drive a 2016 Lexus RX, and my battery has about two months left, so I am trying to learn before I buy. Last time I only looked at the price and the warranty, and I did not even check the date. My cousin says the first thing is the weight, because a light battery usually means something is cheap inside. My neighbor says it is all about the label, and that blurry printing or crooked stickers should make you stop right there. A friend who worked at a spare parts counter said the date code and the serial number are the real proof, and that the shop should be able to tell you what they mean without looking confused. Another guy told me to look at the terminals and the case, because a clean, even case and tight lids are signs of a properly made one. I read a page on to get a simple idea, and it covered the label, the code, the case and the warranty papers, which I wrote on a small note in my phone. Still, I would love from people who have done it in real life, not only from articles. My questions are easy. Which check takes the least time when the shop is busy and you do not want to look rude? Can I take a photo of the code and send it to someone to confirm? Does a genuine battery usually come with a printed warranty card, or is a stamped invoice enough? And if one thing looks off but the rest looks fine, would you still buy it? Please share your first step. Thanks for reading.