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Battery and Waterproof Seal Kit for Polar RS800 and RS400 Watch Training Computer Models : Amazon.co.uk: Sports & Outdoors
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Polar 91039781 - GPS receiver modules (USB, Lithium Polymer (LiPo), Micro-USB, -10-50 °C, IPX7) : Amazon.co.uk: Sports & Outdoors
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Battery and Waterproof Seal Kit for Polar RS800 and RS400 Watch Training Computer Models : Amazon.co.uk: Sports & Outdoors
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