My spare batt. has 15 flights on it and 100% health so far. Occasionally when I go to charge it, it will start charging then the 2 or 3 flashing light go out quickly and just the one green light next to the red button light flashes. The red button goes out and so do the rest of the other lights but that one green light continues to flash and the battery is not taking a charge at that point. After plugging unplugging and changing out lets I finally get it to charge right. It is totally inconsistent. Should I send it back? Any one seen this happen? Any fixes? Thank you all.