I'm with the colonel. Not enough juice to justify the price. The Anker Astro e7 is 26,800mah and around $60. Mines been working perfectly for two seasons now. No way would I pay more to get less just for the name and supposed "ruggedness".
I just bought a Poseidon and im also getting an Anker 20,000mah. I figure I'll use the Anker as my primary and use the Poseidon as my backup in case the Anker takes a crap. That way I know I've got plenty of juice for a 7-10 day hunt. If the Anker craps out during the trip I'll conserve power and still have the fail proof Poseidon as backup. Then at least im not in it for $200. But it's probably safe to use 2 Ankers and keep one in a waterproof container. I will probably be on solo hunts, so I pay more to knock down my risk of failures. At least when your hunting with buddies you can usually scrape through the hunt between both of your gear if one has a failure.