Staying charged while off the grid is crucial, and it's not just about being able to check your Facebook notifications. Cell phones are great all-in-one tools with GPS, maps, calls to emergency services, etc. If you're not car camping and toting a heavy battery pack isn't an option, take a solar charger with you.

These days, solar chargers are a dime a dozen, but AUKEY's flexible solar panels are on sale right now. The 28W Solar Charger will normally set you back $65, but apply promo code AUKEYPP5 at checkout and it'll bring the price down to $52. The 21W Solar Charger retails for $55, but the promo code will bring it down to $42.