Today’s hikers could have five or more electric gadgets with them on a long-distance hike—tools like a global positioning system (GPS) unit, a cellphone, camera, flashlight and a SteriPEN.

Each of which needs batteries or charging.

Hikers don’t like weight they don’t need to carry. But a solar charger like Goal Zero’s Guide 10 Plus or the Solio Bolt Solar Charger might be the perfect gift for your favorite hiker.

Goal Zero’s PV module is encased in a nylon canvass with loops that are easily attachable to a backpack, which means on the pack, it could charge spare batteries throughout the day.

When you’re considering such a device, pay attention to the utility it offers. Look for a device that has the capability to charge a common battery and has multiple tips for different devices.