National Institute of Mental Health
(NiMH) Nickel-Metal Hydride
NIMH: Stands for the National Institute of Mental Health, one of the National Institutes of Health in the U.S., whose mission is to 'provide national leadership dedicated to understanding, treating, and preventing mental illnesses through basic research on the brain and behavior, and through clinical, epidemiological, and services research.'
Nickel metal hydride. A new generation Nicd batteries, the Nikon highest speed 8 fps is achieved using this type of batteries. 
National Institute of Mental Health
Nickel Metal Hydride
(Nickel-Metal Hydride). A type of rechargeable battery. NiMH is the more modern type of rechargeable battery and has been touted as having no memory effect as is common with Nicad type batteries when they are charged before they have been fully discharged.
National Institute of Mental Health.