What are the methods for selecting a good lithium battery

　　Method 1 for choosing a Li-ion battery: Check appearance and packaging

　　Lithium-ion battery products can be judged from the packaging and appearance. Although the appearance of general products is deceptive, some inferior products can also be screened out from the appearance.

　　Choose lithium-ion battery method two: look at the product battery

　　First, check if the battery is brand new, because there are some bad little workshops in the market that use second-hand batteries to make Li-ion batteries. The battery is good, the safety is higher, and the quality of the lithium-ion battery is better!

　　Method 3 for selecting a Li-ion battery: Test live operation

　　In the process of charging the lithium-ion battery, if the battery does not heat up after continuous discharge for about 10 minutes, it proves that the battery protection board system is perfect, and the quality of lithium-ion batteries with high-quality protection boards is generally better than that of ordinary lithium-ion batteries.

　　Method 4 for choosing a Li-ion battery: Comparing weight

　　The weight of a lithium-ion battery is directly proportional to its capacity. If the weight difference is too large, the capacity will definitely be insufficient, but some batteries have different capacities. In addition, you can also perceive whether the battery is heavy from the outer packaging. If it is heavy, it is biased toward high-quality lithium-ion batteries.

　　Method 5 for selecting lithium-ion batteries: Detect internal resistance and maximum current

　　In fact, the fastest way to judge the performance of a lithium-ion battery is to detect the internal resistance and the maximum discharge current. Good quality lithium-ion batteries have very small internal resistance and a large maximum discharge current. Using a multimeter with a range of 20A, the two electrodes of the lithium-ion battery are directly short-circuited. The current should generally be around 10A, or even higher, and it can be maintained for a period of time. A good battery is relatively stable.