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Toss those and rewire the canister for Li-ion which has double the energy density. They haven't been sold in a decade and if they haven't been meticulously maintained and topped off, they won't hold crap for a charge either.
Halcyon are still selling new ones - Halcyon Dive Systems - have the batteries in them been sitting around somewhere for ten years?
Shrugs. I have flown with 100-160 Wh li-ion many times.
If I was just flying on airlines in say the U.S. and Australia then it would be doable, but trying to contact the right person to get permission at say an airline in the Middle East because you are going to the Red Sea - not so easy, and there is no way in hell that you will be able to sneak a 150 Wh lithium battery past their security checks - these guys are very very thorough - as in you will probably empty out all of your carryon onto a table at least twice for the airline's security checks - after you have gone through the airports security checks - and not just at the start of your journey but also at every stop on the way to - even if you flew in on the same airline that you are flying out on again (e.g. Emirates transiting through Dubai).
Yes and Halycon does not sell direct, they are a manufacturer not a retailer. It's not available at any retailer because nobody wants a NIMH pack anymore. Which is why you arent finding any information about it. I already told you NIMH cells are 1.2V each. It would have a 14.4V nominal voltage except its basically no longer made nor sold.
