The Polar H7 heart rate sensor has a user changeable battery. To change the battery yourself, carefully follow the instructions below: When changing the battery, .
Polar H7 heart rate sensor enables training in a group without. will reduce the transmitter battery life.. BluetoothÂ® smart ready devices that support heart rate .
This video shows how to change the battery on your Polar H7 or any of your WearLink+ heart rate sensors (WearLink+ transmitter with Bluetooth, WearLink+ .
Amazon.com : Polar H7 Bluetooth Heart Rate Sensor & Fitness Tracker. BATTERY LIFE: For optimal battery life, detach transmitter from chest strap after every .
Lithium Battery 3V. We can usually work out most problems. eBay!