
Re: Timelapse - camera and batteries question
In my case I'm not too worried about the shutter life of my Canon 600D. It's near 70 000, shot trough out +25C and -25C weathers every year. I don't think single timelapse needs 1000 shots. I usually aim for 240 shots, so I'll get 10 seconds of video on 24fps what is enough for me. When I started timelapse I did shoot much more frames what were useless for me when I cut them off in edit. But of course there's situations when you need more shots than usual.
I use battery grip with 600D. Battery have never ended even when I've shot 6 hours long timelapses, but one down side it's that my battery grip shows just full battery and empty battery, but I've learn pretty much how long it last and when I'll need to charge it.
My remote controller also doesn't show its level, only when it's at very minimum what isn't too useful.

I really don't have any special solution for it other than having spare batteries with me.
I've had only experiences with Canon cameras so I can't give you opinion about Nikon or Panasonic, but I hope that I helped you in some way.