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Polar M400 User Manual | Batteries
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Polar M400 Watch Battery Replacement - iFixit Repair Guide
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![Polar V800 Repair/ Battery Exchange [Tutorial] -- in ENGLISH [EN] - YouTube](https://i.ytimg.com/vi/RisMyRgw2AU/mqdefault.jpg "Polar V800 Repair/ Battery Exchange [Tutorial] -- in ENGLISH [EN] - YouTube")
Polar V800 Repair/ Battery Exchange [Tutorial] -- in ENGLISH [EN] - YouTube
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