In theory you could
However, they are 17ah/hr capacity, which means
You could run a fridge for about 5-6 hours
headlights for less than an hour
radio for 2 hours maybe
Thats a choice of one of them, not all
Also, dont leave your lights on or have any kind of alternator problems, those batteries die real fast
Better option, leave the battery where it is and just carry this
http://www.ebay.com.au/itm/20AH-AMP-HOU ... 073wt_1271Its also too small to be of any use but it will waste less money