Battery jump box suggestions?

Hello everybody, I would like to get some recommendations and suggestions from y'all for battery jump boxes strong enough to jump a diesel engine.

I'm in a cold weather climate, the cold seems to have tanked my battery, and my TDI VW Jetta doesn't want to start. I have a small battery jump box, and it has enough power to jump a regular car, but won't work on my TDI.

Can you guys please give me recommendations and suggestions for battery jump boxes strong enough to jump start a diesel? I don't need top of the line, as I'm hoping to almost never need it, so would prefer budget-friendly suggestions. I'm hoping for something portable enough that I can throw in my roadside tool kit, that won't take up a ton of space.

Thanks.