Can I charge my Polar Unite via a wall outlet?
Your Polar Unite can be charged via computer only with the custom USB charging adapter that came in the box.
When charging via a wall outlet, use a USB power adapter (not included in the product set). If you use a USB power adapter, make sure that the adapter is marked with "output 5Vdc" and that it provides a minimum of 500mA. Only use an adequately safety approved USB power adapter (marked with "LPS", "Limited Power Supply", "UL listed" or “CE”).
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Do not charge Polar products with a 9 volt charger. Using a 9 volt charger can damage your Polar product.