A NiMH battery, or Nickel-Metal Hydride battery, is a type of rechargeable battery widely used in household devices like remote controls, cameras, and toys. It offers higher capacity than older nickel-cadmium (NiCd) batteries, is less prone to memory effect, and is considered safer and more environmentally friendly. NiMH batteries are affordable, available in standard sizes such as AA and AAA, and can be recharged hundreds of times, making them a popular choice for everyday electronics.