No. 45 days battery life is the maximum, meaning that if you use your watch in a very energy-saving way ( i.e., use it to check time only), it will operate 45 days.
Uwear can work about 20 hours if you keep using the GPS function NON-STOP.. For example, you turn on the Maze Escape mode and leave it on for 20 hours. But this is a very uncommon situation. GPS is only on when needed in certain functions (Return Cruise, Maze Escape, or when you are running and want Uwear track your routes, etc.). It will turn off automatically about 10 minutes after you quit those functions. So in most cases, Uwear can work much longer than just 20 hours. The exact working hours really depend on how you use the watch. You may refer to the chart we provided on the campaign page.