I have a 2 year old Garmin Lily which was perfect for my needs and with no problems until a month ago. At this time the battery started taking longer to charge but still lasted 4 to 5 days. Now it will no longer charge at all with the white triangle and flat battery symbol displayed. I have tried another charging cord with no luck. Is this a battery or a software problem? Can it be repaired or do I just buy another watch? Very disappointing.