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              Integration

              • Battery Cell

                Cell refers to a single electrochemical core with positive and negative electrodes, which is not usually used directly. Unlike batteries, which contain protective circuits and shells, they can be used directly. The composition of lithium ion rechargeable battery is as follows: cell + protection circuit board. Rechargeable batteries remove the protective circuit board is the battery, which is the storage part of rechargeable batteries. The quality of the cell directly determines the quality of the rechargeable battery.

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              老师掀起内衣喂我奶头视频,爆乳美女脱内衣裸体视频网站,忘了戴胸罩被同学摸了一节课_高潮