The camera battery is equipped with a protective plate. Try it with a universal charger. If it can be activated, that means it's only because of low voltage protection. The condition to release it is charging (normal chargers can do this). have smart protection. If the battery has no voltage after checking, it will automatically disconnect. If it doesn't work, please replace the battery.
Just because the 18650 battery is new. That doesn't mean it won't break. If the discharge is too low (less than 2.75V) when you use it, it is recommended not to use the battery as a good battery whether it can be charged or not. . An overly discharged battery is dangerous. Generally, the low voltage protection of lithium batteries is set at around 2.5V-2.75V. This is the instantaneous voltage. When it reaches this tension, it will run out of power if you turn off the electrical appliance. will return to a virtual power greater than 3V. If you force it again, turning on the power will cause excessive discharge. It is best to charge immediately after overdischarging. If the discharged battery is not charged in time, then the battery. will gradually reach the end of its service life due to self-discharge consumption.
Current camera batteries are all lithium batteries. If this type of battery is not used for a long time, it will lose activity due to over-discharge or even eventually break.
For this type of battery, it is said that it can be saved by reactivating it... for example, using a short period of high current to stimulate the battery circuit to restore its activity .
However, such an operation itself carries certain risks. Andeven if the battery is saved, it may not guarantee the stable operation of the battery... Because once the lithium battery loses power and loses activity for a long time, the internal circuit state will change from irreversible manner. damage... Once the battery If it fails, it cannot be saved by "activating"... Even if it is saved by stimulating a large current, the operation will be unstable... Installing such a battery in the camera will bring the stability of camera operation may lead to hidden dangers and may even damage the camera.
Therefore, once the camera is not used for a long time and the battery loses its activity, it should be replaced with a new battery... Although the batteries d cameras are not cheap, they are still very cheap compared to cameras... because a If the apsame photo is damaged by a very cheap accessory, the gain exceeds the loss... So you have to make sure that the battery is in good condition...
Also, even if the camera is not used for a long time, the battery must be charged regularly to ensure its activity. By doing this, the battery can be used for a long time...