I use one of these. 150 bucks from jaycar it is a jumpstarter, compressor,has two cigaret lighter sockets, 400W inverter and with LED lights. I use it to run my cameras doing timelapses and dew heaters and easily lasts all night and more. If need can also run my EQ6 but I haven't yet .
http://www.jaycar.com.au/productResu...keyform=CAT2#3