Battery drain a lot faster after update to firmware 4.70

Hi I did a firmware update 3 days ago and note that the battery discharge very fast, without using the GPS. I just wear it to measure the walking distance and after 10 hour use the battery drain down until 20 to 30%. Before that update, I could use it for walk during one week and the battery never get lower than 50%.

The behavior walking is like a golf round using the GPS and I didn´t use it. I still didn´t test in a golf round, but I guess it will drain the battery in a couple of hours.

Please let me know if this new firmware have some bugs about it?