Nickel Metal Hydride (NiMH)Batteries are the rechargeable alternative to common primary cells with stable voltage. NiMH batteries are widely used in the usual types of standard batteries. They can therefore generally replace the conventional alkaline batteries in household devices as a rechargeable alternative. Despite the slightly lower voltage, the NiMH battery can achieve longer run times especially under high loads, since the voltage remains very stable. Typical applications are therefore usually high-powered devices, such as digital cameras, toys, and of course cordless phones.
The other rechargeable system of nickel cadmium (NiCd) batteries can be replaced as well. Advantages over nickel-cadmium batteries which are no longer available over the counter are the lack of toxic cadmium, a higher energy density, and the non-existent memory effect. Disadvantages are the lower overcharging resistance, a higher internal resistance, and a smaller temperature range.
