Would you happen to know if the Duracells are any good? I know they are good with regular ol AA and AAA and smaller sizes but I didn't know till this weekend that they actually make batteries that large. I've never seen one anyway. Hopefully they last as long as the other ones did. I'm not sure if I have to put water in these ones or not. I'll have to read the battery. The other ones I had were maintenance free, which was nice for someone like myself that has never had to put water in a battery. Good luck at the battery shop!