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Cost effective and easy to use, the Efest Slim K4 charger comes with novel 7 languages packaging and user manual. Incredibly lightweight and conveniently portable. LED Indicator in standby mode or fully charged turns blue, white while charging. The springs are made by piano wire, providing smooth sliding action while inserting and removing batteries. Steel cathode with low resistance and hard chromium plating processing to achieve a more precise charging voltage.
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