Diesel battery specs

[adyadad]

The wife's 2016 MD diesel has a flat battery.
Yesterday she came home and the alarm went off for no reason. Today the battery is flat with 10.46 volts at the terminal. Looks like I've got a dead cell.
Ford are useless as usual as the roadside assistance wasn't renewed by them on the last service.

What battery would you suggest. The current one is 175mm high but the Century Overlander DIN75LHD MF is 190mm high.
Any idea if it will fit with regards the height? Width and length are all ok
Thanks in advance.