I’m making a battery thread soon.
121R seems to be the “listed oem replacement” now instead of the incorrect 51R thats meant for the versa cvt.
121R group size lists 215mm for height - but the ones listed on Canadian tire site are actually 206mm tall.
I feel like that’s why some can be “to tall” like the 35 or 25 which is listed as 225mm height or 210- 222mm
Seems the optimal height is between 175mm - 206mm
Seems the optimal length is between 210mm - 230mm (although a group 47 was fitted which is 243mm)
Seems the optimal width is between 171mm - 177mm (the battery lock plate makes width the important factor, 175-177 is best )
The 99R from Napa is L210x175x175 ( only 450cca oem is 470 )
The 121R from ct is L210xW176xH206
The 47R (AGM) from ct is L243xW171xH197 ( little long and little skinny )
The 85 ( non-agm ) from ct L229xW175xH206 ( sweet spot and 650cca and only $161 )
The 35/85 AGM from ct. Same dimension as group47 (600cca) but with 640cca
The 121R seems like a perfectly fine replacement. (550cca) $151
If you need more cold cranking amps group 85 ( 650cca) $160 (19mm or 3/4” longer then 121R(8.25”))
If you want AGM group 47 or 35/85 (600-640cca)$240 (33mm or 1 1/3” longer then 121R)
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