I just purchased a 3PKS and have a couple of questions about the Ni-Cd battery. The manual states to charge the battery for 15 hours, but it does not say what the digital read-out should display when the battery is fully charged. What should a fully charged battery read and what is considered low voltage?

Also, the manual states that sometimes you may need to charge and discharge the battery pak 2 or 3 times to get a full charge. How do you discharge the battery pac?