Mine says xharged 26 times? How many more should i wxpect i dont cpmpletkey drain iy in flight

You keep checking you battery before every flight. Make sure all cells are equal and no warnings. You can discharge once every six month more or less.

It should be in the manual, I believe if you hold the battery power button in for ~5 seconds the number of LEDs will indicate how much life is left in the batteries.

thermographer is right the bar then indicate 4 being best condition 1 light being end of life on batery