I assume they are. I should have been more clear in my original post. I wasn't meaning to say this fill it yourself one that I bought would be a direct replacement for the NT, ( mine was a 12-something model#) but he does have the same battery # in stock mentioned in the original post. I didn't post the sellers info out of respect for the seller that Mellow mentioned that advertises on the ST forum. Time will tell if it's really a good deal, but the bike I put it in is not my daily commuter, just one I take short hops on and play around with. But the battery numbers and sizes the seller had were exact to Yuasa numbers and physical sizes so I felt for $36 including shipping, I'd give it a try. Im sure like everything else, it's a Chinese copy of a Yuasa and I understand if someone feels it's too risky to put in their beloved NT.