ZeroLemon SolarJuice 20000mAh External Battery Pack w/ LED Flashlight: $20 Prime shipped (Reg. $40)

ZeroLemonDirect (100% positive feedback) via Amazon offers its Y594 SolarJuice 20000mAh Battery Pack for $39.99. Applying coupon code PFSNMNU4 drops the final price to $19.99 Prime shipped. For comparison, that’s a 50% savings of the regular price, $5 less than Amazon’s previous low and the best available.

Leverage the power of the sun to charge your iPhone, iPad and other devices with ZeroLemon’s Y594 solar battery pack. It has a 20000mAh capacity, which can charge an iPhone 6/s multiple times and an iPad once. There are dual-USB ports on this model, capable of putting out 2.1 and 1A charging speeds. Additional features include a LED flashlight, rain and shock resistant design and a three-year warranty. Rated 4.3/5 stars by 393 Amazon customers.

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SolarJuice can charge your iPhone about 50% power for an emergency after being solar charged for 8 hours under normal sunlight, since it is not easy for 1.2W input Solar panel to fully charge the built-in battery with sunlight, we suggest it for casual use for a long trip/hiking. Water resistant design ensures the device functions smoothly when it’s raining; Shock-proof feature ensures the device working properly even it crashes or drops. Please do not place SolarJuice on or over-heated place for continuous charging. SolarJuice has a built-in Polymer battery, one of the safest batteries in the world, which are not likely to explode even when over-heated, but can swell up.

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