It is not a peak detect charger. You have two charge rates for the rx side. 50ma and 150ma. The tx side charges at 100ma. If you leave a small rx pack on at the 150ma rate it will cook it if left too long. I fast charge at the field frequently so I cycle more often. After I have fast charged ten times or so the packs don't seem to hold up as long. I cycle once and they are back to normal. This is more noticable on the tx than the rx packs as I never run them down in a days flying. My rx packs are all 2000ma or more.
Later,,, basmntdweller