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Hi there, The original A1331 Battery for my 2009 A1342 MacBook is forcing my macbook to immediately shut down and not power up at all when plugged in. When i remove the battery while AC power is plugged in, the MacBook automatically starts without any issues. Is this normal for a battery that has sat empty for years or is the Battery Circutry damaged/shorted? Thanks in advance and sorry for my bad english

Follow this guide to replace it MacBook Unibody Model A1342 Battery Replacement