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Polar M430 In-Depth Review | DC Rainmaker
190mah 3.8v Battery Core For Polar M430 M400 Gps Sports Watch New Li-polymer Rechargeable Accumulator Replacement - Digital Batteries - AliExpress
Polar M430 HR Review | Tested by GearLab
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Hands-on: Polar's M430 GPS watch with optical HR | DC Rainmaker
Review: Running or not, you'll want the Polar M430 on your wrist | Ars Technica
