I have an E-M5 and one battery. While I haven't had any issues with running out of power during day trips yet, I figure that it might happen on vacation, when I'm out at night as well as the day. I've had that happen before, but that was with a camera that took AAs. So the dilemma I have is, if I buy another battery, when will I have time to charge it if I'm out at night? I'm hardly going to get up in the middle of the night to swap the battery on the charger. I guess if the second battery still has charge I can use what's left the next day without charging it, but being able to charge 1 while using up 2 per day is still a net negative... What do the folks here do in these situations?