Capable of powering everything from lights and heated sleeping bags to camp showers and vacuums, Coleman's OneSource batteries power a wide variety of outdoor accessories. You can now add speakers to the list. The OneSource Portal is a 5-watt portable Bluetooth speaker that runs off Coleman's interchangeable batteries. Its IPX4-rated for water resistance, can charge other gadgets via a top-mounted USB port, offers up to 40 hours of playback with a fully-charged battery, and as always, the battery has an integrated 10-lumen LED flashlight on top for convenience.

Weight: 0.9 lbs