I am thinking of getting a blue tooth headset but I heard that it will cut your battery talk time/standby time by half. Will using blue tooth headset drain your p800 battery very fast?
Battery life with Blue Tooth Headset
Mine seems to but its worth it. Get a car charger, or better still a car kit, then you don't have to worry about it.
Bluetooth is always ON at my phone. The first time I tested the battery life, and I was surprised. 3 days without charging. It depends more how much calls or working with the phone (light etc) you are doing. The battery life is not a reason for not using a bluetooth headset all the time.
Ciao
Christian