I just completed the installation of a 12v outlet in our popup camper. This provides several benefits, including powering an air pump for our inflatable boat and charging batteries for our phones, entertainment devices and even our personal locator beacon.
I’ll also admit that I use outlet this to power a portable movie player for the kids. Screen time isn’t camping you say? Whatever helps the kids sleep past sunrise I say! Then it’s outside until bedtime.
Obviously you don’t want to draw too much power from your popup camper battery, which should always remain above 50% charge for longevity. I have a Dual Battery Setup which gives me plenty of device charging power on shorter trips, but even with two batteries I refrain from any non-essential use on longer trips.
You can use a convenient Battery Charge Indicator to monitor use and remaining battery capacity.