Amazon.com: BoxWave Cable Compatible with Polar M400 (Cable by BoxWave) - Micro USB Keychain Charger, Key Ring Micro USB Cable for Polar M400 - Jet Black : Electronics
Amazon.com: BoxWave Cable Compatible with Polar M400 (Cable by BoxWave) - Micro USB Keychain Charger, Key Ring Micro USB Cable for Polar M400 - Jet Black : Electronics
My M400 is not charging | Polar USA
OEM! JBL FLIP 5 SPEAKER USB TYPE-C CHARGING PORT BOARD REPLACEMENT PARTS E351429 | eBay