i have a couple questions and if anyone can answer them that would be awesome!!
1. Are camera's universal? Do they all take AA batteries? And do all countries use camera's that use AA batteries? do all countries have AA batteries?
2. Are all memory sticks in all countries the same? Or do they vary from country to country?
Not all cameras take AA batteries. Most digital cameras in fact have rechargeable (Li-ion) batteries which are completely unique to that particular family of cameras, and which need their own completely unique chargers. An ever growing number of compact cameras do take AA batteries, but you need to replace them really frequently.
Memory cards are the same in all countries, but differ based on camera and manufacturer. Secure Digital (SD) cards are the most common, used by almost all brands of camera. The exceptions to this are Sony cameras, which take their own (more expensive) "memory stick" format, and Olympus + Fuji cameras, which (used to?) take XD cards. (This is a reason to avoid those particular brands of cameras)
High end DSLR cameras take Compact Flash cards, which used to be pretty much the standard for all cameras some five years ago, before SD took over.
do all countries have AA batteries?
Yes. The AA battery is one of the most commonly used batteries in the world for consumers. Apart from local brands, Energizer and Duracell batteries can also be found in many countries.
Thank you all for answering my questions. its a lot of help to me!