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В кластер входят документы о технических особенностях расчета реальной емкости портативных зарядных устройств, но не входят документы о стоимости и моделях стационарных систем хранения энергии.
Общие признаки: потери энергии при преобразовании напряжения, разница между номинальной и реальной емкостью, расчет доступных мАч (mAh)
Группа выше: Внешние аккумуляторы и резервное питание
Смысл: The main idea is that power bank capacity is often misunderstood because manufacturers list the capacity of the internal cells (at 3.7V) rather than the actual energy available at the output voltage (5V), leading to a calculated loss of usable mAh.
Power banks seem to have less capacity than advertised because the labeled mAh refers to the internal 3.7V battery, not the 5V output provided to your device.
Смысл: The main idea is that the nominal capacity of a power bank does not translate directly to the number of device charges because energy is lost both in the power bank's conversion process and in the device's charging circuitry.
Power banks cannot charge devices as many times as their nominal capacity suggests due to energy losses in both the power bank and the device, typically resulting in an overall efficiency of about 65%.