First - let's establish three areas regarding telemetry: In range, edge of range, and out of range. Edge of range is an intermittent signal.
My experience is that sometimes when you're on the edge of range, when the signal is intermittent, the Litchi log will sometimes become incomplete at that point. Rather than just stop recording, some of the columns will record perfectly, and some of the columns won't record anything new. That is, they become redundant and repeat the same info as the cell above, in that particular column.
As you get further out of range, all the columns will become redundant. And that happens about the same time your screen freezes up. Often the log will still record info, but it'll just be repeating the line above it, over and over, even when it senses no signal at all.
This is usually corrected as the AC gets closer and comes into range.
But this doesn't explain a 0% battery reading. The only thing I can think of that would cause this is actually turning off the controller or the mobile device or otherwise backing out of the Litchi app so that the log had to start over again. In that case, as the AC came into the edge of range, the log would have no starting points, and if the log had only some of the columns valid, the other columns would show a zero.
