Because the voltage of our family is 220v, the voltage setting of the charging flashlight before leaving the factory is also 220v. If we rush to charge under the condition of high voltage or reduced voltage, it may cause the internal circuit of the flashlight to burn out. We need to re-melt the circuit with a solder point pen, and we also need a test pencil to check in real time which part is the problem. When the led lamp of our flashlight is not on, but the charging is normal, it may be burned out, we just need to replace it with a led lamp.
And if it is not possible for our flashlight to charge, then the battery of the flashlight is generally due to improper operation or the end of its life. We need to replace the internal battery to repair our rechargeable flashlight. When the light of our flashlight is on and off, then the problem usually appears on the diode of the flashlight. We need a multimeter to detect which part of the diode is damaged, and then replace the diode in time. This can also be repaired. Our flashlight.