Have a Reliable Way to Charge It
On a similar note to keeping your device protected, you’ll also need to keep it charged to get to its features. But you may not have access to wall outlets during some emergencies or disasters — and even if you do, it’s certainly possible for the power to be out.
Because of that, a good reliable way of charging your device is invaluable. An external battery like this durable Nomad PowerPack can provide more several hours worth of juice. For a longer-term solution, you may want to consider a solar charger (especially if you live in a sunny region).