How the performance of a Ni-Mh rechargeable battery compares to a 1.5V alkaline battery?
Ni-Mh batteries are spirally wound design compare to a bobbin type design of an alkaline battery. The spirally wound design providesa higher electrode surface area therefore the total current reached can be much higher, considering similar kinetics of the battery electrochemical reactions. Due to the same reason, Ni-Mh batteries provide higher discharge voltage than alkaline batteries, the Nexcell batteries have a lower internal impedance when compared to other batteries in the market (info from the Nexcellglobal.com site). Additionally the Ni-Mh will maintain its high voltage constant for a longer time during its discharge phase making them ideal fordemanding power applications, like digital cameras.
