NiMH batteries, or Nickel-Metal Hydride batteries, are a type of rechargeable battery commonly used in various electronic devices. They have a higher capacity than traditional NiCd batteries and are often found in items like digital cameras, remote controls, and electric vehicles. These batteries are known for their environmental benefits, as they contain less toxic materials compared to other battery types. NiMH batteries can be recharged hundreds of times, making them a cost-effective and sustainable choice for powering everyday gadgets.