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For USB cable charging
Please try to change a charging cable and a charger to charge to see whether the LED indicator shows red, make sure that it is not the problem of the cable or charger. Most smartphone chargers can charge it. Also make sure the battery is installed properly and charging cable is plugged tightly on both ends.
For solar charging
Please try to put in place where has direct sunlight to see whether the red LED is on and check the solar charging is normal. Solar charging will not be completed if there is no direct sunlight.
If it can't be charged by USB or solar normally, you may have received a defective car kit. For defective item, kindly contact us via email@example.com and we will send you a replacement.