Ordinary lithium batteries without protective plates are easily damaged by overcharging and overdischarging. Therefore, when the brightness of the flashlight decreases significantly during use, it is necessary to charge it in time. Do not charge it until it has lost power, as this may cause damage. Generally, if the battery is broken, there is no way to save it without professional equipment. Just replace the battery. An imported Sanyo battery only costs more than 20 yuan, and the quality is the best.
I am a manufacturer of titanium flashlights. Currently, the flashlights with relatively strong lighting effect are mainly C10 flashlights equipped with 800 lumens single-chip CREE XML T6 LED. They have a strong medium to short flood light. distances and can focus over long distances. Okay, the lighting effect ofthe road is excellent, it is the first choice for outdoor and night driving. There is also a small 18650 LED equipped with T6 LED, which is small in size and super bright, and can be used for communication.
If the 18650 battery has not been charged for a long time, can it still be activated?
Generally, it can be activated by directly charging the positive and negative terminals of the battery. If the lithium battery is discharged for a long time, it will sometimes automatically discharge to a lower voltage than normal, so the protection board will be turned off. It depends on the design of the protection board and the low voltage.
If the cell voltage is lower, the external protection board cannot be activated. At this time, you should ignore the protection panel and directly charge and activate the battery cell. Generally, a dietSpecial multi-function is required, adjust the no-load voltage to 4.2V, short circuit the positive and negative poles of the power supply, turn on the current limiting function, and adjust the current to less than half. of the nominal capacity of the battery. Of course, the smaller the better. Then turn it on and activate it. Depending on the battery capacity, if the voltage drops below 3V, it can usually be recognized by the universal charger.
Use a lithium battery module to charge the 18650. After the connection is completed, the power tester indicates that the current is zero, but the charging board indicator light is red (an indication of absence of power).
If the 18650 lithium battery is left unused for a long time or over-discharged, the voltage at both ends will be too low. In this case, it will. It may be difficult to charge it with theoriginal charger, 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 the 18650 lithium battery with zero voltage. The battery voltage is still zero after a long time, the battery may be damaged and cannot be used. In addition, if the 18650 lithium battery has a protection board inside, when the battery is over-discharged, the protection board will turn off the output. , resulting in no battery voltage output. , then you need to peel off the plastic skin of the battery and connect the positive and negative poles of the battery directly to the constant current charging circuit above to charge
What you have to pay. attention when buying an electric car:
When buying an electric car What should be noted is the appearance of the electric car ., battery life, 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 certification mandatory 3C and what is the warranty period of the main components of the electric vehicle, etc.
The first thing 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 vehicle battery lifeelectric vehicles and choose an electric vehicle with a battery range adapted to 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.
First of all, you need to understand how this card works.
The red light may indicate that the 18650 voltage is abnormal (too low), or that it is. fully charged, or it has an external charging source. Wait,
It is recommended to measure the voltage of the 18650.
If it is around 4.2V, it is fully charged. , and the circuit board will stop charging current.