We tend to ignore how important the battery is. We are faced with decisions time after around 30 to 36 months after buying a new car or during replaceming the older battery. Often since we have to replace the battery quickly, we go with the advice of the service station or the local battery shop guys.
Branded: It is best to go with the strong brands and avoid the small brands though they are cheaper. The branded batteries are expensive because the build quality and testing is far superior. In terms of build quality it would be primarily the purity and quality of the lead used.
Technology: Exide (tech from global co Choridle PCL) and Amaron (tech from Johnson Control USA, a $20B global giant with cutting edge battery technology).
So I would go either for Exide or Amaron. We maintain a large fleet of vehicles and based on our experience over the past 5 to 6 years, I feel that Amaron quality is superior and gives a trouble free operating life.
