I have no clue if the Interstate M24 sealed battery I got is calcium or just the usual, same as a capped M24.
The last two car batteries I got in the last two years were also both sealed, not caps. No idea if they are calcium or not.
http://www.canadiantire.ca/en/pdp/motomaster-eliminator-automotive-batteries-0103485p.html#srpI tried to look up my second hand battery I got from Interstate. No luck. It is an Econo Power label, meaning refurbished and resold at low price. It says 24M-650 on it with a marker pen. It is all black and is sealed.
So I am not too clear now if it is a starting battery or a marine/rv type (which are usually green and white). It will do the job for me even if it is a starting battery.
I may be wrong in thinking they now have sealed marine/rv batts though. Just don't know now.