A:AnswerIt does not take a certain size picture. These are digital pictures so you can make it any size you want. Of course the larger you make the picture the less quality you will obtain. But at 21 MP you can really get them big with minimal loss in quality.
A:AnswerIf you have tried flipping and rotating the card and then tried a new card and you still receive this error message then it is the unit itself that needs repairs.
A:AnswerYes. Rechargeable batteries are readily available from lots of places. It's a common battery. The battery life is pretty long. I bought a charger with a USB connector so I can charge them in the car if necessary. Also got 2 additional batteries.