Batteries generate hydrogen gas during the charging process. Hydrogen is highly explosive. Always charge the battery in a well-ventilated area. Do not smoke or allow open flames, sparks, or lit cigarettes near the battery while charging.
Maximizing Battery Life: Your Carquest CQ-80CR Go to product viewer dialog for this item. Manual & Guide
To ensure safe operation and maximize battery life, follow these standard procedures found in Carquest user guides :
This is normal. The 40A boost mode uses a full-wave rectifier that creates audible magnetic hum. At 2A or 15A, the hum should be much quieter.
One of the most valuable parts of the is the error code chart. Here is a decoded version:
To keep your CQ 80CR functioning for a decade or more: