How to detect the quality of lithium battery?

　　(1) The fastest test method for lithium battery is to test the internal resistance of lithium battery and the maximum discharge current of lithium battery. For high-quality lithium-ion battery equipment, the internal resistance is very small, and the maximum discharge current is very large. Use a 20A multimeter to directly short-circuit the two electrodes of the lithium ion battery. The current should generally be about 10A or even higher, and can be maintained for a period of time. Good battery is relatively stable

　　(2) Look at the appearance,; The appearance plumpness is relatively large, such as the lithium-ion battery equipment of about 2000mAh. Fine workmanship or plump packaging

　　(3) Look at the hardness; The middle part of the lithium ion battery device can be squeezed gently or moderately. If the hardness is moderate and there is no soft extrusion feeling, it indicates that the lithium battery is of relatively high quality

　　(4) Look at the weight; Remove the outer package and feel whether the battery weight is heavy. If it is thick and heavy, it belongs to high-quality battery

　　(5) During the charging and operation of lithium ion battery equipment, if the battery pole does not generate heat for about 10 minutes, it proves that the battery protection board system is perfect. In general, the quality of lithium-ion battery equipment with high-quality protection plate is better than that of ordinary lithium-ion battery equipment.

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