Why does the battery die so fast?

Reason 1. If the number of battery cycles does not exceed 500 times, but the battery health of Apple mobile phone drops to 80% within one year after purchasing the mobile phone, it indicates that there is something wrong with the battery quality of the mobile phone. In this case, you can apply to Apple for free battery replacement after sale. If the mobile phone has purchased the AppleCare plan, you can apply for battery replacement within two years of using the mobile phone. 2. If the user frequently uses the mobile phone while charging (especially watching videos or playing games), the battery will be excessively damaged due to frequent charging and discharging, resulting in a sharp decline in battery life. If the health of the battery decreases and the user chooses not to replace the battery, the performance of the mobile phone will be limited to ensure the life of the battery. Myth 1: The charging of a mobile phone after it is exhausted is affected by the use of Ni-MH battery. Many people still like to recharge their mobile phones after their batteries are completely exhausted. For lithium batteries, this can't avoid the memory effect. When the battery is used up and recharged, the activity of lithium element is insufficient, which will affect the battery capacity for a long time. Two: when the mobile phone battery is not used for a long time, it should be fully charged (or discharged). Many people have multiple mobile phones or batteries, and some batteries are not used for a long time. Many people take two extreme methods-full charge or discharge. In fact, both of these practices will affect the life of mobile phones. The correct way is to charge the mobile phone to 40~60% and store it in a cool and dry place. Three: the first charge takes more than 12 hours. In 2065, 438+03, mobile phones used lithium batteries. Unlike previous Ni-MH batteries, lithium batteries have no memory effect (specifically, the memory effect is very weak) and are not activated. Charging for a long time will cause some damage to the battery. So what is the best time to control the first charge? It depends on the capacity of the battery. Generally speaking, it takes 2~4 hours, and the mobile phone shows that it can be charged for half an hour after charging is completed.