Customer Value

Customer value is the customer’s evaluation of the difference between all the benefits and all the costs of a market offering relative to those of competing offers. 

Total Customer value = 
(Product benefit, Personal Benefit, Services Benefit, Image Benefit)

Total Customer Cost = 
(Psychological Cost, Time Cost, Energy Cost, Monetary Cost)

Customer Perceived Value = Total Customer Value - Total Customer Cost

Thus its can be said that customer value is the benefit a customer gets from a product or services compared to the cost of procuring it.
The Marketer can increase the value of the customer offering by increasing the total customer benefits and reducing the total customer cost. 

Duracell appears to have a long-term vision to adapt to the changing electronic device market. The "Trusted Everywhere" campaign reflects customers' basic emotional needs for security and reliability. By answering consumer's demands for new technology, it indicates Duracell's customer-oriented values. The main conflict that Duracell has right now is with consumers deciding to purchase rechargeable batteries as opposed to Prismatic. Features & Benefits

Duracell has made sure of launching products that may be of valuable use to its consumers. These products include the commonly used AA, AAA, C, D and 9 volt batteries. They've also kept up with the recent advances in technology launching products such as the Duracell power reserve, which is a usb device that keeps hours of power back up in electronic devices such as cell phones, ipods, ipads, digital cameras, etc.