features multiple protecting functions, such as overheat protection, reverse polarity protection and so on. It can also automatically limit the current when exceeds the max. power. Features: Dual testing modes for selection: electronic load mode and battery capacity test mode. High quality large radiator: dust-proof and stable for performance. LED digital nixie tube display: durable and clear for readings. Rotary encoder design: easy and convenient for operation. Multiple-scale buzzer and LED indicators: indicating the working status. Automatic storage function: can store the setting parameters when power-off; record all parameters and status after power-up. Fan control: intelligent fan control, infinitely variable speed automatically according to the radiator temperature. Protections: Overheat protection, transient overpower protection, over-pressure protection, reverse polarity protection and power supply voltage abnormal protection.