4 AAA+ like all other TI-Nspire calculators.
The Texas Instruments TI-Nspire CX II CAS Color Graphing Calculator with Student Software (PC/Mac)is currently (as of 2021) the most advanced calculator in the world, (aside from supercomputers)
You should try walmart, staples,or Target. If you can't find it there you should be able to order it from the Texas Instruments website.
As far as newest goes, I would say the new addition to the TI Nspire series, which is the cx cas. Exactly like the cx, except it has cas (computing algibraic system). Don't quote me on the abreviation but its something to that degree. Anyway it came out late in 2011 and is flargging amazing... It will do everything you will ever need to do and more, you will be at an advantage with this calculator well into a masters and maybe even a phd in mathematics.
cas pyment
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They don't work directly, but they might with the 84+ keypad. They won't work directly, but they MIGHT if you use the 84+ keypad.
The stars that make up the main constellation of Cassiopeia are: Beta Cas, Gamma Cas, Iota Cas, Omicron Cas, and R Cas.
whats cas
Cas Anvar is 6'.
CaS = Calcium Sulfide
Ja Cas is heel lief. ;)
γ Cas Tsih, Marj, Naviα Cas Schedarβ Cas Caph, Al Sanam al Nakahδ Cas Ruchbah, Ksora