1080P Bullet POE IP Camera, 2.8MM-12MM Varifocal Lens,SV-B11VPOE-1080P

评论

发表评论

此博客中的热门博文

What are the consequences of using a poor quality power supply?

What are the consequences of using a poor quality power supply?  Mobile phone accessories wholesale  manufacturers tell you the answer A power source is a device that provides electrical energy and plays a key role in the product equipment that needs to be powered. At present, there are few well-known brands of power supplies, and most of the cheap and inferior power supplies are flooding the market. What are the consequences of poor quality power? Because the power is insufficient, the power supply is always overloaded, which shortens the power supply life; 2, does not play a protective role on the product, easy to burn the product equipment; 3. Because it is necessary to ensure low prices, capacitor resistors and the like can be cheaper and cheaper, and the repair rate is high; 4. Respond to the harsh power environment, the power supply has poor resistance to wide voltage, and frequent bad power supply.
阅读全文

How to maintain the battery of iphone mobile phone

图片
1, iphone uses lithium polymer battery, there is no memory effect, so absolutely do not need to charge and discharge thoroughly (that is, you want to charge at any time). 2. After each charge and discharge cycle of a lithium cell phone battery , the power will decrease by a little, and it will be reduced to 80% after about 400 charge and discharge cycles. The so-called charge-discharge cycles are completely filled and radiated, that is, if you use 20% of the electricity to be full, it is necessary to repeat the charge-discharge cycle five times. 3. Since the battery has a chip to calculate the power, for the purpose of calibration, a complete re-discharge should be done once a month (ie, when it is fully charged, no electricity is used). 4, as long as the apple's official power supply, full of power will be used directly after the model, there is no overcharge problem. 5, the lithium battery charging process is the first 80% of the use of fast charging can be c...
阅读全文

Phone charger stability and convenience

When we buy goods, most of them will consider what brand, quality, price and so on. In fact, the purchase of the phone charger is the same, everyone will carefully consider what brand, stability, convenience, etc. before the purchase, but after use, all the shortcomings will be ignored, just use it, unless it is really not used Will only consider changing. The following Jin Xinyu power supply will discuss the convenience and stability of the phone charger. stability Phone chargers are mostly in the same stability, based on the performance of overcurrent protection, EMI radiation, voltage deviation, ripple suppression, cross load, timing, dynamic testing, etc., to determine whether the phone charger can be stable for a long time. run.   Depending on the environment, the data will behave differently and the stability will not be the same. For example, our domestic mains voltage is 220V, and the mains voltages such as Japan, the United States, and Canada are 110V. The stab...
阅读全文