I just received a used battery. It had 33 charges, was at 93% for about 5 minutes. Decided to run the 1.6 update and the battery level went to the above level. I then checked the overall status to find the below. I got a feeling what this means, but just wanting confirmationUnder the previous App, if you started a fight with less than a full battery, you ran the risk of the app saying the battery was drained, and it would try to land. Happened to me several times. I would powere back on like you, and would have battery power.
Solution: upgrade to newest firmware. Always start with a fully charged battery. "Start" is the key word. You can start/stop flights on the same battery, but when you put in a new one, it needs to be fully charged. I have had no further issues since using batteries in this manner.