Battery manufacturers say that after approximately 400 cycles, a phone's battery capacity will degrade by 20%. It can only store 80% of the energy it originally had and will continue to degrade with additional charge cycles. However, the reality is that the phone's batteries probably degrade faster than that. With each charge cycle, the phone's battery degrades slightly. A charge cycle is a discharge and full charge of the battery, from 0% to 100%. Partial charges count as a fraction of a cycle. Charging your phone from 50% to 100%, for example, would be half of a charging cycle. Do that twice and it is a full charge cycle.Some phones reach that 20% degradation point after only 100 charge cycles.
Required Android Versions : Jelly Bean [4.1–4.3.1] - KitKat [4.4–4.4.4] - Lollipop [5.0–5.0.2] - Marshmallow [6.0 - 6.0.1] - Nougat [7.0 – 7.1.1] - Oreo [8.0-8.1]