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Lightweight and easy to carry is the most important design goal of TWS headsets. Limited by the small space of the charging box and earphones, the battery capacity used in these two parts cannot be increased. The capacity of the charging box is generally within 1000mAh (in which 200- The most common in the 700mAh range), and the capacity of the earphone is smaller, most of which are less than 100mAh. Therefore, whether it is a charging box or a headset, attention should be paid to the low-power design of the system to ensure that the product has a longer use time