PolarGlobal on X: "Today we've launched a new heart rate sensor: Polar H9! - Bluetooth, ANT+ and 5 kHz technologies - Battery life of 400 hours - Compatible with Polar Club Discover
POLAR Heart Rate Sensor H1 Watch Compatible Bluetooth Smart Monitor, New Battery | eBay
2025 Battery Replacement for your Polar H7 Heart Rate Monitor - TheBatterySupplier.Com
Polar H10 won't connect unless I remove red rubber washer. Is your battery cover flush? Using CR2025. : r/Polarfitness
Amazon.com : Polar H9 Heart Rate Sensor – ANT + / Bluetooth - Waterproof HR Monitor with Soft Chest Strap for Gym, Cycling, Running, Outdoor Sports : Sports & Outdoors
Polar H10 Heart Rate Sensor Black With User Replaceable Battery - XS/S - Walmart.com