First, an overview 
 Traditional charger and simple charger most of the work-frequency transformer and rectifier (SCR voltage regulator) circuit, or even use the SCR directly regulates the mains to the battery charging, although the circuit is simple, but the shortcomings can not be ignored: 
 ① bulky to transport, inconvenient to use; 
 ② lack of complete protection, poor reliability; 
 (3) a charging of human duty, and constantly adjusts the charging current, it is difficult to do even if the battery is fully charged without causing overcharge; 
 4 SCR directly adjust the mains and the mains do not isolate the risk of electric shock, and the destruction of the mains waveform and have a great supply line losses. 
 Battery over discharge, overcharge and long-term owe the full can cause premature aging of the battery plates and shorten battery life. To avoid such occurrences, extended battery life, the device electrical characteristics and batteries for the same case, select the key factors of different functional types of charger into extended battery life. This is why some traditional charger, users complained that the battery life not as good as the factory to provide the nominal long life. The automatic charger with advanced non-working frequency transformer switching power supply technology, small size, light weight, high efficiency; combination of smart charging technology to extend battery life and time for the battery is fully charged for the purpose, aimed at overcoming the working frequency type charging the shortcomings of the machine design, power frequency charger can significantly extend battery life, so completely free of human duty, fully automatic working state, especially for use in unattended charging occasion, long-term connection to the battery in order to maintain fully charged state, suitable supplemental charging power for cars and generators and other equipment. The automatic charger for supporting the charging capacity 120Ah within 12V/24V open or sealed battery for temporary charge can also be used for long-term floating. 
 Second, the main characteristics and uses 
 (1) Automatic microcomputer intelligent control, easy to use, easy to operate. 
 Switching power supply control chip imported military grade IC, the remaining components are used to import industrial grade device charger design optimization reasonable strict improvement of the production process to ensure the reliability and stability of the machine. 
 Strictly in accordance with the battery charging characteristics curve for charging, the charging method of design is the "constant charge → Hang Yajian the flow → float charging speed, high efficiency of charge to restore without human duty, super-long charge overcharge risk to ensure that the battery life. 
 The charging current 8 ~ 12A, and not the input AC voltage fluctuations during the constant current charging current remains unchanged, without any manual adjustment. 
 5 AC and DC compatible input, and wide input voltage range. 
 6 with the output of the battery positive and negative automatic identification circuit, controlled by computer, fast response, long life. The machine also features thermal shutdown protection function to ensure that the user be assured that safe use. 
 7 has a battery status display, the battery charging status at a glance. 
 Third, the main technical reference 
 Input voltage: single-phase AC (180 ~ 260) V; 50Hz 
 Nominal output voltage: 18V/34V 
 Maximum output current: 12A 
 The maximum power of the input power: 300w 
 Charging program: constant current charging → the constant Yajian flow → float. 
 Environmental conditions: Operating temperature: (-30 ~ 60) ° C; 
 Storage Temperature: (-40 ~ 80) ℃; 
 Corresponding Humidity: 90% (40 ± 2 ° C); 
 Atmospheric pressure: (70-106) kpa 
 Working efficiency: ≥ 86% efficacy factor: 0.85 
 Dielectric Strength: Input Voltage AC500V output on the shell ≥ shell and ≥ AC1500V output; 
 Mean time between failure (MTBF): ≥ 50000h 
 Thermal shutdown temperature threshold: (75 80) ° C 
 Machine weight: Net weight 1kg 
 Dimensions: 305mm × 220mm × 130mm