[grizzfan]

I recently purchased two Interstate U911 batteries for my '73 911T. They fit just fine although one of the terminal covers binds just a little bit against the top of the battery box. It's lead-acid but cannot comment on whether it's 'sealed' or not. I didn't see the aperture for a drain tube on the batteries but will look soon as I'm doing some maintenance in that area.

They are pretty powerful batteries as I put my Porsche to bed in early November with the two installed and no trickle charger over the winter. Fired right up in early March after one of the coldest winters in Montana in a decade or two.

Tom