What does the button do?!?!!

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I read the manual that came with the battery.  Maybe I missed it, but there is no mention of what the button on the end of the unit does.  I'm trying to figure out why one of my batteries charged and its light went out when done.  The other battery finished and had a flashing green light. I pushed it and it went solid green. Can I just turn the thing off so I can store it and not have it waste charge on a flashing light?
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Posted 2 years ago

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Official Response
To try and answer your question. It's not really a button. It's a light (called Power Indicator in the manual) that serves a dual purpose. First is to indicate state of charge. Green light usually indicates sufficient charge to power the tool you are putting it in. Red means it needs a recharge. The other purpose is to indicate certain errors or failure modes. There is a troubleshooting section in the battery manual that helps decipher what the different colors mean. For example, flashing orange can mean an overheat condition. 

As Blue Angel says, blinking green is usually an indication of a failed battery.