EFEST Slim K4 USB-C Intelligent Battery Charger

EFEST Slim K4 USB-C Intelligent Battery Charger

Marsoni

M251S

$14.49

Get it in 3 business days with 1 day shipping. Friday, May 29

EFEST Slim K4 USB-C Intelligent Battery Charger4 x Battery Slots Slim K4 Quad Four Slot Battery Charger Cost effective and easy to use, the Efest SLIM K4 Charger is incredibly lightweight and conveniently portable. Steel cathodes with low resistance and hard chromium plating processing to achieve a more precise charging voltage. 15,000+ Time spring testing quality warning. The K4 also has 6 protection levels: Short circuit protection, Automatic over charging protection, Automatic over discharging

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Fast: 2-3 business days
Express: 1-2 business days

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Exchange/Return Notes

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Now I know why this one was so cheap! The taste was not pleasing to me at all... I threw it away. However, I do love their other lines, with the berry flavor being the best! Orange is good too but to obtain the best flavor, 2 spoons are required (for me anyways). Also, the berry flavor (while only taking 1 spoon) is even better tasting if you add a little lemon juice to it. Finally, I read that adding lemon juice to water helps to prevent kidney stones! Who knew! This is a good product but I think they went to far trying to add "fizz".... the effect was negative while the previous products are great!

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Reviewed in the United States on October 26, 2025

Verified Purchase

Green cam

West Palm Beach, US

★★★★★ 5

Fizzing fiber drink

This is a great tasting fiber drink, plus added vitamins..

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on April 10, 2026