Battery Tender Jr. fine to maintain my two 6-Volt batteries?

I think I'm just gonna throw a charge or two on them them until they got back in storage again int he fall.

But once I do this and these sit for 6 odd months the linked Battery Tender Jr. should be a fine option to throw on a fully charged set of batteries (2-6volts making 1-12volt) and let it sit and maintain my batteries for the entire off-season right?