My mid-2010 MBP is saying I need to replace the battery but when I look at the battery in System Information I see this: Charge Information: Charge Remaining (mAh): 0 Fully Charged: No Charging: No Full Charge Capacity (mAh): 4580 Health Information: Cycle Count: 117 Condition: Replace Now Battery Installed: Yes Amperage (mA): 0 Voltage (mV): 8242 It's saying it's installed, a low cycle count, and a full charge capacity of 4580. I don't understand why this battery needs to be replaced. I am running OS X Yosemite. Can anyone tell my what might the issue be? I don't want to pay for a battery replacement if it doesn't need it.