 Can I change the battery on my Polar device? Battery life time depends highly on how much you use the device.Chinese, TraditionalSlovenianEnglishPolishItalianSpanishRomanianLithuanianHungarianChinese, SimplifiedPortugueseRussianCzechSwedishEstonianGermanDanishCroatianJapaneseFinnishTurkishFrenchNorwegianDutchKoreanMultiple Languages 