Having a difficult time finding a replacement battery. I have a TET 12N9-BS that measures 5-1/4"H x 2-7/8"D x 5-1/4"W (134mm x 73mm x 134mm). Everything I'm finding is 137 x 75 x 135 or bigger. The extra height is keeping me from inserting the battery into it's box.

What have others used for replacement batteries? Exact make and model number please.

/Mike