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I haven't been using my Fitbit Alta HR for the past 5 months. While plugging in the charger, the watch isn't vibrating but is showing this display soon after the Fitbit logo.
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Amazon.com: Battery 36mAh Replacement for Fitbit Alta,Alta HR,Alta Activity, Fitbit FB406 : Electronics
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100% NEW Battery for Fitbit Alta Smart Watch for Fitbit Alta HR battery +USB cable+toolkit - AliExpress
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