It has been half a century since the first commercial lithium battery was released by Sony in 1991. Lithium batteries are closely related to our daily life and are inseparable. They are widely used in various electronic products. In order to protect the rights and interests of consumers, the safety of products More and more attention is being paid to it; the safety of the battery bears the brunt. At present, the safety certification of lithium batteries in all countries is quite strict, and many countries are mandatory certification tests.

Lithium-ion batteries have been commercialized since the 1990s. Nowadays, they have entered the daily life of ordinary people. We use mobile phones, tablets, smart watches, VR glasses, digital cameras and other portable electronic products, almost all use lithium-ion batteries.

At present, whether the battery is a lithium iron phosphate battery, a ternary battery, or a lithium titanate battery can not be separated from the battery protection circuit board, someone asked why use a protection board? Wouldn't it save a lot of money not to use a protective plate? Customers who think this way are not surprised, because they do not understand lithium batteries, do not understand the characteristics of the battery, if you understand the lithium battery, you will feel that this money can not be saved, this is the last line of defense to ensure the safety of battery products.

The lithium-ion battery protection board current is determined by the detection voltage of the protection IC and the internal resistance of the MOS tube. If the protection IC cannot be changed, you can change the MOS tube, such as DW01 and 8205MOS, using a MOS tube is 2 ~ 5A, using two The MOS tube parallel current will double. At present, some large-capacity mobile power supplies use 3 to 4 MOS tubes in parallel.

As the iPhone is used longer, you will find that its battery life is not as strong as when you first bought it. Although it can still be used, it needs frequent charging. For any user, this is normal. In theory, as long as you turn on the iPhone's battery life is consuming and irreversible. But that doesn't mean we can't do anything about it, and develop good charging habits that will allow your iPhone battery to last one year longer than others.