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yeah, I read a few reviews, the powerall ones are lithium ion I think so nice and compact, vs the likes of that super cheap one which is likely sealed lead acid, skinny leads are criticised in...

Looking for one that can start a diesel 4wd from flat yet not too bulky, heavy or expensive so it can also come in the jet boat. I see this one from supercheap is on sale but it weights 7.5kg...