Total waste of time posting but so funny, yes all three lipos could and would fail together. They are all one Mod with lipos behaving the same as each other. Standing (storage or how they come new) voltage for lipos is 3.8 volts, this needs to be checked regular, too high or too low and they will deplete, too low and they will die. Below 2.9 I believe will kill them. DNA 200 likes to be used, charged, used, charged, used, charged, they do not like to be left ignored. I know as have done exactly the same and they die. If your going to stop using them, disharge to 3.8 and check weekly. Do not just throw them away as any voltage left on them can turn them into a small bomb. Make sure you recycle them (give to hobby shop) or throw them in a bucket of salt water and leave them for a very long time. Proper lipo chargers can safetly disharge them fully. Then they can be thrown away safetly.