The Nickel-Metal Hydride (NiMH) Battery is a rechargeable power source known for its high energy density and environmentally friendly composition compared to traditional Nickel-Cadmium (NiCd) batteries.

This specific NiMH battery has a 4.2 amp-hour (Ah) capacity, meaning it can supply 4.2 amps of current for one hour or a lower current for a longer duration. It is commonly used in portable electronic devices, power tools, medical equipment, and backup power applications due to its reliability, long cycle life, and ability to retain charge efficiently.