Production of electric chargers for proper use, electric cars are battery-powered. Everyone who owns an electric car knows that the battery is the deciding factor in the life of an electric car. Battery failure, battery replacement is a lot of electric car owners will do, but there is an electric car parts replacement faster than the battery! That is the electric car charger, many times due to the user’s carelessness, or not enough attention, resulting in charger failure and so on! To keep the chargers in good condition, do we need to know the common malfunctions of these chargers during charging? When charging, The red light is not on or only the green light on the charger output fuse. 2) charger output cable open. 3) if the connection between the charging socket and the battery is abnormal or the connection between the charging socket and the battery socket is not bright, the battery box may have an open battery pack connection or a fuse. 4) the battery pack itself failed due to severe vulcanization of the panel. 5) charger red light tube damaged.Short charging time 1) the battery pack itself has low capacity and poor performance. 2) one of the batteries in the pack has a significantly reduced capacity or an excessive voltage. Charger fan failure, resulting in the charger temperature is too high, the protection circuit is too high, leading to premature charger stop charging. Charging can not normal state, that is, the red light can not turn Green 1) battery pack itself failure, such as power grid failure, resulting in low battery voltage, charging temperature abnormal, unable to switch state. 2) after using the battery for a period of time, due to a serious lack of water inside the battery, the battery can not work properly, the battery is abnormally hot, and may even be inflated. 3) the high ambient temperature during charging increases the leakage current of the battery, which may lead to the abnormal operation of the battery. 4) battery and charger does not match, resulting in long-term overcharge or overcharge, resulting in battery water loss, charger does not turn the light. 5) the charger current is too small, charging time is too long, in the expected time can not effectively charge the battery, resulting in the charger does not turn on the lights. Indicator light is not on, charger is damaged or indicator light is damaged.