I've got one of the SK's (solar) new in box if you are interested. I bought it and never got a chance to put it out.. but I run several of the X's and one original Reveal on regular alkaline batteries and depending on how many photos you get you can expect 2000-2500 photos on a set of alkalines.. closer to 4000-4500 on lithium. With the solar, if you've got direct sunlight you should be able to get a ton more pictures if you've got enough sun to keep the battery charged and keep up with amount of pictures you get a day. On the SK you can choose which SIM card you want to use.. it comes with both AT&T and Verizon. You just put whichever card in you want to use for service.