Lithium ion batteries are divided into square lithium batteries (such as commonly used mobile phone battery cells), cylindrical lithium batteries (such as 18650, 18500, etc.) and button type lithium batteries according to their shapes; lithium batteries are divided into aluminum shell lithium batteries, steel shell lithium batteries, soft package batteries according to the packaging materials; lithium cobalt oxide, lithium iron phosphate, lithium manganese oxide, lithium polymer are divided according to the cathode materials.
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