Well, I can't find the battery online. At the Sealife site, I see the charging kit & battery for $50, but it doesn't say which battery. Looking around the site further, I see some references to the old SL16134, plus a link to "all batteries and chargers" but then I get "There are currently no items in the category you selected, but it is likely there will be in the future. Please check again the next time you visit." Or if SL16134 is the new battery, I don't see a way to order it.
I found an Australian site offering a Sealife battery for DC1200 for around $40 AUD, claiming it's good for 200 shots (maybe that's if you turn the flash off and shoot shallow?), as well as a 4GB card for $40 AUD. I am not going to ask if they ship to Texas.
Still wondering where I can find Lenmar DL040B 780 mAh batteries?
I wonder if this one would work? I really don't see any reason that it should tho.