I usually carry cash and card, and my Apple Watch & I phone to back up the watch in case it runs out of charge. But I carry a back up battery pack and a lead, for both devices (my battery pack has two ports so I can charge both devices at the same time). But just in case I do carry another lead and plug, just in case the battery pack should need a charge. However, I do also have a camel and a couple of goats with me, just in case I have to barter. Though I?m finding that I often bring a barrow of carrots, as more and more people are turning vegan and won?t accept the goats, and trying to get change for a camel is difficult sometimes.