The battery life on Dell Latitude D620 laptops with six-cell batteries is approximately two hours and 30 minutes under typical operating conditions such as web browsing and sending emails. If you want, or need, more battery charge time, consider upgrading to a nine-cell battery. Dell D620 extended life batteries are available now at USB Phone World at amazingly low prices. These new lithium ion batteries are 11.1V and have a capacity of 7200mAh. A Dell D620 nine-cell battery review will show that laptop users can perform basic computing tasks for well over three hours before needing to attach the device to an AC charger. These batteries are guaranteed to meet or exceed OEM specifications and although they are compatible with the D620 laptops, users will notice that they are slightly longer than six-cell batteries. The battery location on D620 devices is on the front of the laptop rather than in back, so installing the nine-cell battery will create a very small lip at the front of the computer. These batteries are more than 50 percent less than the retail costs, making these batteries a very good investment. Wholesale buyers can also benefit from USB Phone World prices as the cost per unit decreases as more batteries are purchased.