There are many vehicles and equipment that have been powered by lithium-ion batteries . But unlike regular lead acid batteries, it can be more expensive to replace lithium ion batteries for those.

Li-ion batteries can be recharged, but even rechargeable batteries have a short cycle time before they degrade. Over time, they take more time to start up and lose power faster, which is why it's important to know how to check if the lithium battery has run out so you can replace it or buy a new one, otherwise it will damage your gadget. How do I check the life cycle of lithium ion battery? Let’s get into the passage with this question.

 How do you know if the lithium battery has reached the end of its life?

The life cycle of lithium ion battery is obvious as rechargeable battery. For a battery that can only give you a few needles, this is absolutely abnormal. It is probably dead-after a few recharges, it has reached the end of its life, or it is unreliable.

The manufacturer advertises that the battery has no retention effect, so you can charge it at any time, even if it has been used for a short period of time. It is recommended not to overcharge.

Ways to know either your lithium battery is at the end of life or not:

 A.Take out the battery, put a voltmeter on it, then paste the voltage you get on it, and then put the battery in.

B.If the battery is dead or almost used up, it cannot be recharged.

C.If the battery runs out or ends its service life, the battery will swell a bit.

D.Rapid battery heating is also a sign that battery life is coming to an end.

E.The accumulated chemical energy in the battery is converted into electrical energy, which is transferred from the battery to the flashlight cap. Lighting it up also indicates the life cycle of lithium ion battery. 

How to test lithium battery?

Rechargeable lithium-ion batteries come in many shapes and sizes. Lithium-ion batteries were originally designed in the 1970s and have become the battery of choice for a wide range of electronic devices. Over time, lithium-ion batteries lose their ability to carry electrical charges. This is why it is necessary to test lithium batteries frequently. 

Procedures of testing a lithium battery

You are supposed to check the owner's system manual for which the battery is being checked.

A. Switch the voltage meter on.

B. Set the meter to be measured in volts.

C. Locate the positive and negative poles of the lithium-ion battery. Normally, these will be at the end of the battery, which slides first into the system it is capable of. The terminals are small, but clearly marked plus or minus.

D. Place your volt meter's corresponding positive and negative leads into your battery terminals. The charge sumor volts) will be shown on the scale of your meter.

E. Compare it with the voltage that is given in the manual of the battery and it is done. 

How to wake up a sleeping lithium battery?

Lithium-ion batteries provide a protection circuit to protect the battery from violence. This critical precaution will also shut down the battery, and when the battery is overloaded, it will become unusable. By storing the lithium battery pack in a discharged state for any length of time as self-discharge, when the remaining charge is slowly exhausted, it will enter the sleep mode. Depending on the manufacturer, the lithium-ion defense circuit switches between 2.2 to 2.9 V/battery. 

Many battery chargers and analyzers have wake-up or "boost" functions to reactivate and charge the sleeping battery. Without this clause, the charger will render these batteries unusable and discard these devices. A small charging current can be used to trigger the safety circuit. If the battery voltage reaches an appropriate level, the charger will start charging regularly.

Do not allow lithium batteries to survive for a week or longer under the condition of less than 1.5 V/cell. Inside the battery, a copper shunt may be formed, which may cause some or all of the electrical short circuit. Such batteries may become unstable while charging, causing overheating or other abnormalities. 

Make sure the polarity is correct when charging. If the polarity is reversed, advanced chargers and battery analyzers will not support the load. Lithium ions during sleep will not be exposed to voltage, so awareness must be raised. Lithium ions are more susceptible to shocks than other devices, and reverse voltage can cause permanent damage.

Conclusion:

The life cycle of a lithium ion battery can be extended through well maintenance and correct use.The above-mentioned tips are the preliminary test. If you encounter some technical problem cannot be tested, please contact the manufacturer to give you a better solution.