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Depends on your workouts. I workout two hours a day some time three times a day and I get over a week about 10-13 days. If you workout less you can get three weeks.
Sorry, there was a problem. Please try again later.Once a week
Sorry, there was a problem. Please try again later.Every 4 or 5 days depending on how much u train. I use the heart rate monitor daily for at least an hour or two and I charge it every 5 days. PURCHASE THE EXTRA WARRANTY FROM BEST BUY!! Worth the $!!
Sorry, there was a problem. Please try again later.The M400 has up to 8 hours of training time (when both GPS and heart rate are in use). You can get up to 24 days in time mode with daily activity monitoring - Mike @ Polar USA
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