Yes, in fact I recommend to everyone who buys them to keep two sets of rechargables for this purpose, while one is being used the other is charged and stored then you can just switch them out
Only batteries that are marked "Rechargeable" are rechargeable. Are others are single use.
I would strongly suggest the use of rechargeable batteries over conventional batteries. Non rechargeable batteries could "explode" during recharging. Any rechargeable battery will work if they are the same voltage.
Getting rechargeable batteries for cameras will depend upon your camera. Depending on your camera you may be required to use a rechargeable battery for your camera.
because it is rechargeable
There are some rechargeable portable DVD players where you can use rechargeable batteries, they cannot be used in every portable DVD player because at some point the batteries start to slow down.
There are many hearing aids that do not use rechargeable batteries. There are a few out there that do, but you need to make sure you are buying a specific brand.
No
I'm thinking you can
Cadmium
No, beryllium batteries are not rechargeable. They are typically primary batteries, meaning they are designed for one-time use and should not be recharged.
No, NASA did not invent smoke detectors. Smoke detectors were actually invented by George Andrew Darby in 1902. NASA has, however, improved smoke detectors for use in spacecraft and space stations.
Photoelectric smoke detectors use a light beam to detect smoke particles, while ionization smoke detectors use radioactive particles to detect smoke. Photoelectric detectors are better at detecting smoldering fires, while ionization detectors are more sensitive to fast-flaming fires.