... car charger,and so on,megaphone,amplifier,speech amplifier,guide amplifier,car megaphone,mini audio and professional power amplifier .Our company was established in ... .5V±0.3V(load)12V:13.8±0.3V(no-load) 14.8V±0.3V(load)Output current:60V:1.0~4 ... :1,Make sure the positive and the negative of circuit output is the same to batteries, or destroy the charger and ...