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7.4V charging, intelligent chip protections, full charging disconnection, with shortcircuit protections, overcharge protections, constant current charging, faster speed. 3Pin interfaces, suitable for remote controlled watch twist car. Intelligent load recognition chip, blocking excessive current and voltages from entering, protecting equipment from damage. With LED indication light show the charging clearly. USB 5V power supply, can connection to charging adapter, computers, power adapter and more for charging.