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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Your EFEST Slim K4 USB-C Intelligent Battery Charger orders ship within 1-2 business days.

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Standard: 3-7 business days
Fast: 2-3 business days
Express: 1-2 business days

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Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
Final sale items are not eligible for returns or exchanges.
To process your return/exchange, please contact us at [email protected]
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If I could give this review, zero stars, I definitely would. I am extremely unhappy with the whole experience I’ve had with the seller, which is woot. They have no experience in selling products. They attach fake serial numbers on items that they shipped to you and when you tell them, you have a problem they are of no assistance. I am extremely infuriated with the quality of this product. I spent a lump sum amount of money on this now piece of junk. Oh, and to add my house almost caught on fire because the product overheated. I do not recommend anybody buy from the seller. The functionality is terrible. I am going to spread the word to everybody about my experience.

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Reviewed in the United States on October 16, 2025

Verified Purchase

Cyn Fry

Alexandria, US

★★★★★ 5

Great little machine

Style: 88 oz & 5 Presets

I bought two! My sons love them!

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Reviewed in the United States on April 17, 2026

Verified Purchase