Why does the Rechargeable Foldable LED Desk Lamp make a squeaking sound when charging?

In general, this type of lamp uses lead acid batteries similar to car batteries. When charging, there will be a sound similar to heated water, but it should not be very loud. This may be due to the load design problem. current. The phenomenon you mentioned. \x0d\ A rechargeable desk lamp is a desk lamp that uses an LED, or light-emitting diode, as a light source. It has lithium battery charging function and USB interface charging function. LED is a solid-state semiconductor device that can. directly convert electricity into light. \x0d\ Maintenance: \x0d\ Many users don't notice that some users just like to use the power of the rechargeable LED desk lamp and then charge it until it's time to use it. The light source of the LED rechargeable desk lamp generally hasa relatively long lifespan. If it's not an overvoltage or short circuit, it usually won't turn off. \x0d\ If you need to replace the light source, you should refer to the specified parameters of the rechargeable LED desk lamp for assembly, and do not change the structure randomly. There should be no moisture, dust or impurities around the rechargeable LED desk lamp. If you find any, clean it up in time. When using LED lamps, try not to turn them on and off repeatedly, as this will significantly reduce the lifespan of the LED lamps. \x0d\ The battery of the rechargeable LED desk lamp is well protected. If it needs to be replaced, please choose a qualified product. Recharge the rechargeable LED desk lamp when the power is almost exhausted. Do not recharge it when the energy is exhausted. Please wait a small amount of energy beforeto recharge. If it is not used for a long time, it can be recharged from time to time. The storage floor should not be placed in a damp place.