... Min; 6). Environmental:Operating temperature: 0 °C -40 °C, 5% -90% RH; Storage temperature: -20 °C -85 °C, 5% -95% RH; 7). Cooling ... Copper(>89W). No undertension on chargers. 3,Heat Dissipation:Designed by standard pure aluminum sheet, good heat cunducting,low temperature,high ... material cost. 4,Key components:The master chip is design by Leadtrand/SLS/Ang Bao plans( high efficiency,with Overvoltage ...