Have you ever gone camping, trekking, or surfing, and wished you had enough power backup for your GoPro or GPS? Have you ever had to contact someone during a disaster or emergency and couldn't because your smartphone gave up? SunJack's foldable solar panel chargers could become a feasible and long-term personal power companion for you.

Solar Panels That Offer Maximum Power in a Backpack

The SunJack 25 Watt foldable ETFE monocrystalline solar panel charger with two 10,000mAh power bank batteries can absorb and store energy for up to eight smartphones after five hours of sunlight. With wall-outlet charging speeds, two USB ports on the structure offer two amps of power output each that could fully charge most phones in only 90 minutes. You can also use it to charge your power banks and then directly plug in your phones or tablets to the solar panels so they have enough storage for nighttime use.

While you have the option to directly plug in your devices or use your personal power banks, the ones offered by SunJack are specifically optimized to the solar panels for optimum storage and performance. They claim that their two USB ports could cumulatively pump out up to four amps of current that could simultaneously charge two iPads when under direct sunlight.

Two 10,000mAh power banks from SunJack could discharge up to three amps of power with Qualcomm 3.0 Quick Charge capability to rapidly charge your devices 80 percent faster than standard chargers. These power banks are also compatible with QC 2.0 devices while a built-in smart IC chip prevents your devices from overcharging and overheating.

SunJack's Solar Panel Technology

SunJack's monocrystalline solar cells offer up to 19 percent efficiency and better longevity compared to the less pure polycrystalline solar cells that are cheaper but also have comparatively low heat tolerance. The ETFE (Ethylene-Tetra-Fluoro-Ehtylene) coating on SunJack's solar panels makes them durable and corrosion-resistant with a lifespan of up to 10 years compared to PET (Polyethylene terephthalate) coating that typically only lasts for five years. The ETFE coating makes their solar panels weather-proof and offers ultraviolet permeability as high as 95 percent for better light transmissibility and ultimately, higher energy absorption.

SunJack solar chargers have a rugged and durable design that makes them shock-proof and water-resistant. Although the solar panels are immune to light drizzle, the USB ports remain susceptible to damage, so it isn't advisable to expose them to heavy rain. The power output may also fluctuate due to changes in light intensity caused by shade or clouds. You may choose to buy their solar charger with or without the power banks as per your requirements and enjoy a 1-year free warranty, irrespective.

Generally, all orders are shipped via FedEx and leave their facility within one business day from the time of order confirmation. Standard shipping for all domestic orders in the U.S. is free and could take three to five business days to deliver. You may opt for the expedited shipping for second-day air delivery that will cost you a fee based on weight.

Bear in mind that due to shipping restrictions on lithium-ion batteries, orders inclusive of power banks are only shipped using the free standard shipping method to nearly all states in the US. Expedited shipping is not available for orders containing lithium batteries due to special handling requirements.

Go energy independent today with SunJack's solar chargers.