Wait, so you're telling me you actually got a full wrap and fruit through the TSA line without any hassle? That's the part I keep getting stuck on because I tried bringing a yogurt cup in my carry on last spring and they made me toss it at the checkpoint, said it counted as a liquid over the limit. I've heard peanut butter gets flagged too for the same reason, which seems crazy since it's not exactly drinkable. Do you pack the wrap in a soft cooler or just toss it in your bag and hope for the best? And does the grocery store run work when you're traveling for work and don't have a car to get to a market the night before? I want to save that kind of money but I'm trying to figure out where the actual line is between smart planning and getting stuff taken away at security.

I ran into this same thing on some gate access panels a couple years ago. Those little 7Ah bricks will hold voltage fine with no load and then fall on their face the second anything draws on them. What worked for me was a cheap carbon pile load tester set to about half the rated amp hour, so like 3.5A for your units, and watch how fast it drops. If it sinks below 11.5V in under ten seconds, it's toast. Takes maybe 30 seconds per battery and you can do it right there in the truck. Beats swapping good batteries and eating the cost, or worse, getting the 2am call again.