Take this with a grain of salt because I've not tried it myself but back when ZWO introduced the ASIAir Pro, a number of users complained about poor WiFi range as the ASIAir box had no external antenna. A number of people set a wireless WiFi range extender (go to your favorite internet store and search for WiFi extender, WiFi range extender, WiFi signal booster, etc) next to the ASIAir Pro to boost the signal. As long as you have a way to power the WiFi extender, you should be good to go. WiFi range extenders don't draw very much power so, assuming you're only powering that and nothing else, even a small power pack with an AC outlet built in should supply power for quite a while. For instance, I'm seeing several 30 to 40 Ah power supplies for $60-$70 US. Range extenders typically aren't going to draw much more than 10 watts so a 30 Ah power pack should keep your range extender running for a number of nights w/o recharge. That's under ideal conditions, of course ... you're going to lose a lot of power going from DC to AC and a cold night can substantially decrease a battery's capacity but, still you should be fine for a weekend's use. If you want to be safe, double the capacity (i.e., something more like a 60-100 Ah pack). Any electrical engineers or anyone more familiar with WiFi extenders running off batteries feel free to unmercifully correct me.