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Those batteries tend to fail often. Id suggest replacing the battery with a higher rated battery.. For instance this is a 1200 mAh battery, which will last a bit longer compared to the standard 1000mAh battery the device shipped with. http://amzn.to/29fNd55
While replacing the battery will solve the issue, let me know if you have had the garmin under a year, as in that case instead of paying for the battery Id guide you through contacting the repair / returns department at Garmin so you can have the device repaired as part of your warranty.
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