190mah 3.8v Battery Core For Polar M430 M400 Gps Sports Watch New Li-polymer Rechargeable Accumulator Replacement+track Code - Digital Batteries - AliExpress
Amazon.com: BoxWave Cable compatible con Polar M400 (cable de BoxWave) - Cable DirectSync, cable de carga y sincronización duradero para Polar M400 : Celulares y Accesorios
Polar M430: la esperada renovación del Polar M400 - Foroatletismo.com
Hsabat 600mah Battery For Polar M430 M400 Gps Sports Watch New Li-polymer Rechargeable Accumulator Replacement Batteries - Digital Batteries - AliExpress