I got a new Lenmar battery, charged it up while the 722 was plugged in, recorded a show and then left the 722 on the next day to fully discharge the battery. The Lenmar instructions suggest that the battery may initially need to be fully charged and then discharged to achieve maximum capacity. So I leave the battery attached to the 722, plug in the 722 power cable, see the orange light flashing and let it charge overnight. The next morning, the orange light is solid but when I go to turn it on, it shows 6.4V and immediately turns back off. I've always charged batteries this way. Is it better to charge them in an external charger? I currently have the battery in a Lenmar dual charger.