(Click on image to get high resolution copy)
Sealed Lead Acid divelight batteries are black, heavy. festooned with wires, and look like bombs. This can be a problem, one which can only get worse now that the airlines are inspecting checked as well as carry-on luggage. However SLAs are completely legal to fly with, under a variety of FAA and other regulations, as long as they are clearly labeled as "Unspillable". The problem is to convince whoever is in charge of that without making too big a fuss.
These (copyrighted) battery labels are intended to work subliminally - petty authority figures are always reluctant to admit they don't know everything, and once they get suspicious, no amount of reasoning may prevail. Rather than actually look something up (or admit they don't know how to look it up) they will usually opt for "playing it safe", at your expense.
However, if they read something in print without having it waved in their face first, it will often go straight, so to speak, into their subconcious, and they will assume they knew it all along, especially if it is couched in official-sounding language. Hence these stickers, which cite all the applicable regulations in an official-looking, circular, non-confrontational form.
To use it, click on the image to get the high resolution version, save it to your computer, then paste it into a label printing or graphics program of your choice and print onto sticky label stock - it is sized to fit on a standard 2"x4" (50mmx100mm) label. Laser printing is preferred, as it is more waterproof, and while waterproof label stock like the BARDURA or AVERY 05513 will make a more durable label, plain old paper labels like the AVERY 05263 will last pretty well if you aren't in the habit of flooding your canister too often. On multiple battery packs, put a label on each battery, to make it look as if they came with the battery rather than being added Later.
We'd appreciate feedback on these. Let us know how they work out.