Power Bank Shell Digital Display 7*18650 Battery Charger Box Mobile Power Supply Case Type-C Charging Treasure Shell Kit

Category : Electronic Components & Supplies | Active Components

USD 2.53USD 3.67

Power Bank Shell Digital Display 7*18650 Battery Charger Box Mobile Power Supply Case Type-C Charging Treasure Shell Kit

Description
Specification

Description

Product selling point:1. Using high-quality materials, the quality is guaranteed2. Stable performance and good effect3. Small size, easy to use4. LED digital cold light screen, the display is clearer and more intuitive5. Wide range of applicationsParameter:Battery type: 18650 battery (flat head, no protection board, internal resistance less than 80 milliohms, 1C discharge rate, the voltage of each cell must be between 3.3-4.2V), do not use pointed batteries and other batteries that do not meet the requirements ! )Output: 5V2AInput: 5V2AInput interface: Type-C+Micro portFeatures: The motherboard is equipped with anti-reverse protection, the battery is installed reversely, and the motherboard is not burned. If it is reinstalled correctly, it can be used normally, but do not have one positive and one negative, it will cause the battery to short-circuit and burn the spring.Be sure to use a 18650 battery with a diameter of less than 18.2mm. If it is too large, the casing will be deformed and the cover cannot be closed.How to test the quality of the battery:Step 1: Make sure that the test of one battery and one battery cannot be connected in parallel with multiple batteries at the same time, which will affect the test effect, and each time the battery is put in, it cannot be reversed, and the reverse will damage the motherboard. No second time.Step 2: Put in the battery, the icon on the LED screen will continue to light up for about 1 second, this phenomenon can prove that the battery is usable and can be used in parallel.Step 3: Press the button to display the approximate battery power. It is recommended that the maximum and minimum power of a single battery should not exceed 20. If the battery is too low, charge it to a certain extent before using it in parallel. After all good batteries are connected in parallel, test the motherboard charge and discharge once. After no problem. Basically you're done!Note:This simple test cannot test the aging degree of the battery. If it is found that the charging and discharging of the power bank is fast, the battery storage effect is poor. It is recommended to test the charge and discharge of each battery one by one. Eliminate batteries that charge fast and drain fast. Avoid generating loopback currents that damage good batteries!How to judge the battery has been damaged, or scrapped:In the same test steps above, the LED screen of the reason why the non-discharged battery damages the motherboard has no response, and there is no response when pressing the button, which proves that the battery has been damaged. Or completely scrapped. These batteries cannot be used, let alone a good battery in parallel to try to restore the spent battery. This operation will cause a loopback current, which will damage the good battery.Product common problems and solutions:1. Why does the charging cut off or automatically shut down?Reason 1: The charging cable is poor;Reason 2: The main board is under-voltage, over-current protection, the battery performance is poor, and the boost output will be disconnected; this phenomenon is caused by using a new battery, which is caused by a large internal resistance, especially when using a flashlight battery such as UltraFire (any flashlight 18650 The battery cannot be used); if the battery is disassembled, it is aging, and the remaining cycles of charge and discharge are not many, but generally, it will not be disconnected when fully charged.Solution: Use a better charging cable (at least 2A)Install a few more batteries to reduce the internal resistance of the battery, or replace the battery with low internal resistance, the use of power batteries is better.2. About the reason for burning the spring.The battery is one positive and one negative or the skin is broken, which leads to a direct short circuit between the batteries; if it is caused during the output process, it is caused by the battery sparking, the battery is in poor contact, the battery voltage difference is too large, the internal resistance value is too different, and the working state is strong. The current will cause the spring to shrink.Solution: Be sure to fix the battery before closing the cover to avoid frequent shaking; the burned spring position needs to be manually welded and put in the battery again, the battery needs to be re-insulated before it can be used, the battery with large internal resistance needs to be removed, the voltage difference is too high Large, need to be filled separately to be connected in parallel.3. The mobile phone shows 100% but the power bank has not turned off the output.When charging the mobile phone, there is actually some virtual voltage when the display is full, and the current keeps trickling in. Until it is fully charged, you don't have to worry too much about charging the phone, because the charger is not output all the time, and the phone has not been charged; this principle is actually related to the cut-off current. The minimum cut-off current of this chip is 50 mA, as long as the mobile phone is lower than At this charging current, the power bank will not be able to recognize the current and automatically turn off the output; because the minimum current value of each mobile phone is different, some mobile phones may be 98% full, and some mobile phones are still charging 100%, especially when there are many mobile phones running programs When the charging current is still quite large, it is also a normal phenomenon.4. What phenomenon belongs to the battery performance problem?A: The battery has a voltage of 4.2V when it is fully charged, but the phone is disconnected immediately after charging. The motherboard is under-voltage protected, and the boost voltage of the unprotected board has dropped below 4.5V, indicating that the battery has been damaged and cannot be Normal use.B: When the battery is discharged above 3.4V, it will not be able to discharge electricity.In fact, the voltage you tested is the standby voltage after disconnection. In the actual working state, when the load is output, the battery voltage is close to 3V, and it is disconnected. You can know by directly testing the load voltage. These batteries are generally disassembled and aging. If it is a new battery, it can only mean that the internal resistance of the battery is relatively large, or the 18650 battery of the flashlight is used, or even lower than 0.5 C-discharged C-product battery. Because after standby, the voltage will slowly rise back up again, and this kind of battery will affect the experience.C: The charging is very fast, and the discharge is also very fast, and there is no electricity.This shows that the available capacity is not much, and it is common in batteries that have been used a lot, or have been overcharged and discharged, such as flashlight batteries.D: The battery cannot be charged, or it is difficult to be fully charged, or even not fully chargedFirst rule out whether to use a low-power charger, or the interference caused by the fast charging and flashing charger is not charging. Excluding external conditions, that is, batteries with problems, such as batteries with large internal resistance, aging disassembled batteries, batteries that have been used for a long time and have been cycled many times, or flashlight batteries with protective plates, are connected in parallel in the battery pack This phenomenon occurs even with batteries that have been overcharged and discharged.Package Included:1* Digital display 7 battery box (battery not included)