battery consumption on Apple watch 5 series

Hi, I charge the watch every night until it is full 100%, but in usage during the day at night it goes down till 30/35% of battery.

I thought the battery would last similar to my Iphone which lasts normally 2 days with normal use, but it is a problem if I have to charge the watch every night.

Does anyone have a similar problem or is normal the lasting of the battery in these series?

Does somebody in Apple have a solution for this problem?

Thanks.