I have an airsoft battery pack (Intellect 9.6v) collecting dust. I’m pretty sure each cell is labeled 2000mah AA. Is there any concern into taking the outer wrapper of this pack off and reusing the AAs in other devices?
If it was me, I’d want to make sure that they were nimh and that my charger was suitable. Beyond that, the only other problem is cleaning off the tabs/wires without damaging the underlying battery. Take a look at some of the threads on laptop pulls — there should be some good info in there.