Battery cycle switches over after 85%

[251920]

Hi, I noticed that my battery cycle (according to istat) switches over at 15%.
So as son as it switches over to the next cycle I plug in the adapter to make the battery run a cycle from 100%-0.(I know the cycle in 100%) But it still switches over at 15%, that means that the battery ran only 85% of its capacity.
How can that be?
Is it possible to reset(delete) battery cycle data?

 

[miles01110]

A cycle is one full discharge and recharge, but it doesn't have to be continuous. For example,

100% -> 0 -> 100% = 1 cycle

85% -> 50% -> 100% -> 35% = 1 cycle

100% -> 50% -> 100% -> 50% = 1 cycle

so you were probably caught in the middle of a cycle or something. Does it always change over at 15% ?

 

[251920]

In changes at 15-13%.
I know that a cycle is 100%. So I waited for it to switch to the next cycle and I started charging it, so that a full cycle would be froom 100-0.
But still, it changes at 15-13%.