Maybe the battery's dead, so it's not charging. So this is the time to replace the original battery. Because the battery has a life, generally 2-5 years. Specific with the use of the environment has a direct relationship.
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There are various causes of failure, and it is necessary to check, test and judge gradually from outside to inside, from mechanical to electrical, from software to hardware. But more important is to pay attention to prevention, to improve the poor use of the environment, change the bad use of habits, adhere to the scientific and reasonable use of procedures to start, shut down and operation.