Microsoft Active Sync & Palm Treo

Hi all

I have a Palm Treo 750v with Vodafone push email and until recently used the push email service to obtain emails and synced via bluetooth to my laptop for calender etc.

We have now gone to Microsoft Exchange and it works fantastically well, often I receive emails on my Treo before my laptop. The problem is it drains the battery so much it will only last for 6 hours!! I have chaged the settings under Active Sync so that I send/receive manually but the emails still seem to come though anyway and it seems to be continuously trying to connect via gps/3g.

I have emailed Palm and they do not know how I can change things to help. To be honest I'd very very happy to send/receive as and when I want to check when I'm out and about and then change to a more regular connecting when connected to the mains.

Can anyone out there help me!!!!!!!