Core Viewpoint - The article discusses the correct practices for charging mobile phones, debunking outdated myths and providing updated guidelines for optimal battery maintenance and longevity [2][4]. Charging Practices - It is a misconception that mobile phones should be fully charged and fully discharged. Modern lithium-ion batteries do not suffer from memory effect like older nickel-cadmium batteries, allowing for more flexible charging habits [2][4]. - The lifespan of lithium-ion batteries is closely related to charging cycles. Each complete discharge and recharge counts as one cycle, and deep discharges can damage the battery structure, leading to reduced capacity. Therefore, "multiple small charges" are recommended [4]. Charging Sequence - The correct sequence for charging is to plug the charger into the power source first, then connect the data cable to the phone. This prevents potential surge voltage that could damage the phone [6]. Disconnecting Devices - When disconnecting after charging, it is advisable to unplug the phone first before removing the charger. This helps avoid reverse current that can accelerate battery aging [9]. Power Banks - Many power banks claim high capacities (e.g., 20,000 mAh), but the actual usable capacity is lower due to energy loss during conversion. Users should check the rated capacity in the manual for accurate information [10][13]. - Similar to mobile phones, power banks also use lithium-ion batteries and are affected by charging cycles. The same "multiple small charges" practice is recommended for them [13]. Charging Equipment - There is a belief that using mismatched chargers can cause battery damage. However, most chargers have smart chips that adjust the output to match the device's requirements [15]. - Playing games while charging can lead to increased temperatures, which negatively impacts battery lifespan. It is also advised to avoid thick phone cases that can trap heat [15].