The “Shenhuo” flashlight and battery are so bad that I don’t even know if the capacity is 20% of the rated value. The key is that there are too many false sparks. When a lithium battery is discharged, there is a cut-off voltage. If discharged to this value, an overly discharged battery will have serious consequences. the battery is already at 0V and cannot be repaired. It is recommended to buy it again. Taobao Store: I purchased the 18650 battery from Yingpu Digital Outdoor Store, which is a 2200 MAH battery with sufficient capacity.
Additionally, when the battery is used in a flashlight, the battery without a protective plate should be charged when it is visibly dark. You cannot wait until the battery runs out before recharging it. You can use the battery with a protective plate as long as you use it until it stops turning on. When it reaches tdisconnection, you will no longer be allowed to discharge it.
18650 lithium batteryIf it is idle for a long time or over-discharged, the voltage at both ends will be too low at that time. it will be very difficult to use the original charger. Difficult to load. In this case, you can first use a constant current source to increase the voltage of the 18650 lithium battery to about 3V, and then use the original charger to charge it.
For 18650 lithium battery with zero voltage, if the battery voltage is still zero after long-time charging, the battery may be damaged and cannot be used. In addition, if the 18650 lithium battery has a protection plate inside, when the battery is over-discharged, the protection plate will turn off the output, resulting in no output voltage from the battery. plastic outer skinique of the battery and connect the positive and negative electrodes of the battery directly to the constant above. It can only be charged when connected to the current charging circuit.
After the battery is repaired, you can use a heat shrink tubing of appropriate diameter (heat shrink tubing for 18650 lithium batteries are sold online) to reseal the battery.
What you should pay attention to when buying an electric car:
What you should pay attention to when buying purchase an electric car, it is its appearance, endurance, braking performance, battery performance, etc., and also check whether the electric vehicle meets national standards, whether it can be registered, whether the electric vehicle has the mandatory 3C certification and what is the warranty period of the main components of the electric vehicle, etc.
The first thing youWhat you see when buying an electric car is the appearance of the electric car. When you buy your favorite electric car, you should pay attention to check whether there are any defects in the paint and workmanship of the car. Electric car.
Check the battery life of electric vehicles and choose an electric vehicle with battery range that fits your trip length needs. You can test the electric bike you want to buy to check whether there are any problems with the braking performance, and you can also check whether the riding feeling is comfortable.