What size emergency battery booster for W27?

[JiminVA]

Thinking of getting an emergency battery booster to have on board in case I accidentally let batteries die. Something like the Weego looks cheap and easy to store. But what size?

Their middle size says for diesels up to 3.2L (specs on Weego model are 12000 mAH, and starting/peak current of 200A/400A.)

Larger model says for diesels up to 4.8L (specs on Weego model are 18000 mAH, and starting/peak current of 300A/600A.)

I have a 1986 Westerbeke 30 hp diesel, model W-27.

Suggestions as to what I would need for an emergency booster?

[sailormed]

Better ask Weego directly, I have no idea of the capacity of their products. But for the price you could buy and install a second battery on board.