Medea PISA Battery Pack

CholeCO2006

Does anyone have any experience with running their pump off the battery pack?  How long do the batteries last?  We're going camping this weekend and I'm debating taking my pump. I won't have time to get to the store to pick up the car adapter so I thought I'd try the battery pack. I'm not sure if I'll even need to pump. But I want to be prepared just in case. I skipped my weekend pumping sessions last weekend and my supply definitely took a hit. So I'd hate to skip them again this weekend.