I have some battery questions for the experts here... Feel free to answer any or all that you know the answer to. I have a couple other homebuilt quads that use Lipo batteries, and when I'm not going to be using them for a few days, I put them on my charger and get them to a "storage charge" to help extend the life of the battery. 1. On the DJI GO app, I know I can set the TIME TO DISCHARGE to a set amount of days... I'm assuming this discharges the battery to a "storage charge" like a standard Lipo correct? 2. I have mine set to 2 days, what do you guys set yours to? 3. Does the firmware on a brand new battery get upgraded the first time it gets installed into the aircraft, or is there something I need to do? 4. If I borrow a buddy's battery, (assuming we both have the same firmware version) will everything be fine for me, and for him when I give it back?