If the mobile phone itself is an original battery, it will drop by 5% after two months of use. In fact, it is not the reason why the battery is complete. It may also be the reason for charging, because once the iPhone is cycled, it is worth charging from 0% to 100%. If the battery is often charged less than 20% or overcharged, the battery capacity may be damaged.
Secondly, it may be the battery. We set 80% of the battery cycle times to 500 times. Under normal circumstances, 1% will cycle about 25 times. If it is cycled once a day, it will consume about 2% to 3% of electricity, so the battery consumes 5%, which may be caused by too many charging times, not the battery. Finally, a suggestion: don't wait for the phone to run out of power before charging. When the battery of the mobile phone is lower than 20%, it will give a low battery alarm. Charging at this time will make the battery power loss, so don't charge when the battery power is less than 20%. Of course, it is enough to ensure that it is charged once a month. Don't overcharge, for example, don't unplug the mobile phone after it is fully charged 100%, so the automatic shutdown function will increase the battery loss of the mobile phone. Charge the battery to 20% to 100%. It can be charged to about 50% of the battery, and can be recharged when necessary.