By now a lot of 2015/2016 batteries are starting to show their age. There has been some back and forth and the aftermarket providers donít have great info due to the micra not being available in USA.
The stock OEM battery is 24410-zw40c ( a discontinued versa battery )
Because of that link to versa a lot of lists show group51R as a replacement. This is only for the versa cvt and itís too skinny to be held by the clamps.
Our battery is held by clamps at the base on the battery tray. Not the over the top tie down.
This makes the width ( 175mm +/- 2mm ) the critical factor.
The closest direct replacement is the group99R (T4) with same specs
( 550amp 470cca ) 8.25in ( 210mm) by 6.875 by 6.875 In (175mm )
Napa Canada has listed 121R (550cca) as a oem replacement.
The 121R is slightly larger but cheaper, more common and has higher CCA which is better for our cold climate.
Itís a smart move to save money and have more power available for cold winter starts.
Be careful on height as it can be difficult to get the positive terminal over the post if the battery is too tall.
Next size up is 96R (590cca)/ 90 ( 600cca ) it is longer then stock (243mm) like the group47 (600cca)
this does technically fit as a group 47 has been fitted
However, if using an aftermarket intake you may have a tight fit.
Next is the group 85 (650cca) 230x175x206 $160, 3 year roadside service
Its a little longer then stock, but not a long as others, taller then stock, but not as tall as other. Just as wide as stock. Extra 200 cca.
Like most things there isnít one ďrightĒ answer. Itís what you need it for that matters.
Attached is a spreadsheet with general specs of the group sizes plus the actual sizes as listed on CT and Napa website with prices