I limited it using Amplify Pro. Will see if it's what affects battery the most, but, as Better Battery Stats shows, AquaMail Partial Wakelock has highest number of times and time it takes. I'm sure part of it is checking the emails, but wanted to try with this as its service with the biggest usage.
If I'm mistaken and it will break something with syncing I wile un limit it.
Strange is that I didn't use widget (to many accounts, so little space). Or maybe I used it, but after that I reflashed the firmware on my device...