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Charger The charger is a device that supplements the battery with electrical energy. Generally, it is divided into two-stage charging mode and three-stage charging mode. Two-stage charging mode: constant voltage charging first, the charging current gradually decreases as the battery voltage rises, and when the battery power is replenished to a certain level, the battery voltage will rise to the set value of the charger, and it will switch to trickle charging at this time. Three-stage charging mode: at the beginning of charging, the battery is charged with constant current to quickly replenish energy; after the battery voltage rises, it is switched to constant voltage charging. At this time, the battery energy is slowly replenished and the battery voltage continues to rise; the charging termination voltage of the charger is reached. value, switch to trickle charging to maintain the battery and supply the battery's self-discharge current. The battery is the on-board energy that provides the energy of the electric vehicle, and the electric vehicle mainly uses a combination of lead-acid batteries. In addition, nickel-metal hydride batteries and lithium-ion batteries have also been used in some lightweight folding electric vehicles. Tips for use: The main control board of the controller is the main circuit of the electric vehicle, which has a large working current and emits a large amount of heat. Therefore, electric vehicles should not be parked in the sun or exposed to the rain for a long time, so as to avoid the failure of the controller.