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If you mean a watch which will last 20 days while continuously tracking GPS, I think it unlikely. The lowest-power GPS modules (e.g. this one) run at about 20 mW. For 20 days' continuous use th...
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If you mean a watch which will last 20 days while continuously tracking GPS, I think it unlikely. The lowest-power GPS modules (e.g. this one) run at about 20 mW. For 20 days' continuous use th...