Remember that batteries don't like heat. And in summer it gets very hot under those Trol bonnets. So maybe it is a good idea to allow for a litle space around the battery by not going too big.
Jorrie
1998 4500 GRX (Benji)
2011 4800 GRX Adventure 60 (Jorrie)
2011 Jimny Sold (Benji)
2 x 2019 Jimnies (1 x Lizzybean69, 1 x Jorrie)