Apple has revealed more details about its Watch - and finally announced how long it will last on a single charge.
Although Apple's boss Tim Cook said the Watch has an 'all-day' battery life, he added that with typical use this is more likely to be 18 hours.
The tech giant unveiled the wearable originally in September but used tonight's event at the Yerba Buena Centre in California to unveil more details about how it works, the apps it will run, prices and availability.
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