why are the lithium AA battery's not rechargeable?

Question

the lithium battery's in my phone's & video cam are rechargeable.

Answer 1

"Are Lithium Ion batteries available in standard sizes like AA , C or D cell size?"

"No, Lithium-ion batteries are not available in standard sizes. We believe this is because it would be too easy for users to inadvertently put them in a charger not designed for Lithium-ion batteries creating a potentially dangerous situation. (If an alkaline battery is put into the wrong charger it might leak or even burst, but a lithium-ion battery put into a NiCd or NiMH charger not designed for lithium-ion, might ignite. Also, because Li-ion batteries operate at much higher voltage (typically 3.7V per cell) than the 1.2 to 1.5V of most cell batteries, designing a 1.5V lithium-ion cell would be expensive." - http://www.greenbatteries.com/libafa.html#What%20is%20the%20dif%20Lithium