The Pre-Heat Function
One of the biggest differences between the Alpha 85S/100 and Alpha 85 comes down to the Pre-Heat Technology. Pre-Heat Technology dramatically beefs up the battery's performance in freezing weather, enabling it to operate at -40°F. Thus, you can feel free to hit the road in winter.
Therefore, they support different operating temperature ranges:
Alpha 85S/100 operates from -40℉ to -113 ℉;
While Alpha 85 operates from -5℉ to -113℉.
3 steps for the Pre-Heat Function:
Step 1: Connect the clamps to the car battery correctly.
Step 2: The Pre-Heat Function will operate automatically and the pre-heat icon will display on the screen when the detected temperature is below the ideal working temperature.
Step 3: READY sign shows on the screen after preheating, then start your car engine.
Note: "Pre-Heat" icon will automatically show on the screen; all you have to do is waiting for the product to warm up and reach an ideal operating temperature.