Look around and perform your own mini-survey. I can safely bet you will not find a laptop owner with 2 batteries.
?Consumer Reports? recommends buying an extra battery for laptops. However, the battery in Dell latitude D620 lasts for 7 hours. Is it important to buy an extra battery? If the extra battery is worth the price, do you recommend the 6 Cell Modular Bay Battery?
Please answer both questions
Thank you for your help