The Moov HR Sweat™ lithium-polymer rechargeable battery lasts up to one week of daily use on a single charge if you workout roughly one hour per day.
It takes 2 hours for the battery to be fully charged.
Frequent motion, even when not in active use, for example when you place your Moov HR Sweat core in your gym bag and you carry your gym bag around, may drain battery from the core. You'll notice that the core is "working" when the green light pulses. In order to preserve your core battery, avoid putting it in a place that experience frequent motion. It is best placed in a secure place.