There seems to be a lot of confusion about re-calibrating batteries with the release notes of FW 1.3.0 stating to take batteries down to 5% then fully charging back to 100% to bring batteries back up to full capacity (4500mAH for a TB47). In my experience, 5% does not work, since after doing 5 TB47s that way with FW 1.3.0 I saw anywhere from 4100-4400 mAH capacity after charging them back to full. So I did some research and found a post by @mixmaven on RCGroups Inspire thread here who stated that he found out from a DJI battery expert that the trick is to get the lowest cell voltage down to 3.30V, which in my case meant bringing the batteries to 0% (This has been confirmed by RCGroups DJI Forum Support @blade strike). Even then, once my motors stopped, lowest voltage climbed to around 3.40-3.45V before the voltage drained to 3.30V. Easiest way I found to do this: Fly a fully charged battery down to around 20% (turn your battery warnings down to 15% and 10% respectively), then hover just above ground with LG down and wait for the RTH message, cancel it, and when you get the critical battery warning at 10% and the craft wants to land, just hold the throttle up to hover until it shows 3.3V (probably lower than 5% showing) and let it land. Once the motors stop, the cells will probably increase about .10V, so just leave it powered on until you see 3.30V on the lowest cell. Be mindful of battery temp while doing this, it did climb pretty high in this procedure. If in the field and once the motors stop, take off the props and put Inspire in front of the A/C vents in your vehicle. The trick, once again, is to discharge in one cycle down to the desired voltage, leaving the battery on the whole time. That worked for me. Upon recharge to full, all my batteries showed a full 4500 mAH capacity. As mentioned elsewhere, battery life will probably drop a couple percentage points from previous value after the calibration. Since calibration, my impression is that I've gained about a minute or so in flight time on my batteries. Don't forget to reset your battery warning levels once you go fly again!