Are these graphs all from the same sequence (ie you flew a Masters sequence on each of them)? When you say the 'tail end' of a flight do you mean the initial part of the graph?

It is too hard to tell anything about your batteries unless you are doing consistant sequences if you want direct comparison.

Also, have you calibrated your EagleTree yet. I would be suspicious of the 42+ volt reading on the second group in the chart.

Woodie