Thanks PilotAlan for the tips. I admit, I was quite surprised when it hit 37% with 3 hours of use. The whole point of getting rid of my notebook was to lighten-up my carry-on. So the external battery is a bit counterproductive in that regard.

Regarding your advice:

1. I do total shutdown at least when I'm done for the day. Way back had a ThinkPad that wouldn't wake up from sleep, has left me a little sleep-gun-shy.

2. Is set at Balanced.

3. Brightness is at about 60%

4. Your settings would work for me so I adjusted to same.

5. I do try to turn off the WiFi when not needed, but admittedly do forget on occasion (although not yesterday/day before)

6. I have Norton Security and will check into that. You made good points.

Now, they were early morning flights and because I was working I was using the lighted keyboard, is that a significant power drain? Although, later in the day the "power remaining" seemed to fall off before my eyes.

Does the using the pen add to excessive drain?

Thanks,
Doris