Does charging it and using it damage the battery?

also tips can give me keep battery life good?

 

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this should answer most, if not all, of battery questions:
apple notebook battery faq by ggjstudios
the f.a.q. includes following topics:

• battery information
• battery life charge
• ac power
• calibration
• battery lifespan
• checking status , health
• charging
• what cycle?
• batteries not covered
• bulging or swelling battery

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