Search results
Results From The WOW.Com Content Network
NiCd vs. NiMH vs. Li-ion vs. Li–polymer vs. LTO. Types Cell Voltage Self-discharge Memory Cycles Times Temperature Weight NiCd: 1.2V: 20%/month: Yes: Up to 800
A nickel–metal hydride battery (NiMH or Ni–MH) is a type of rechargeable battery. The chemical reaction at the positive electrode is similar to that of the nickel–cadmium cell (NiCd), with both using nickel oxide hydroxide (NiOOH). However, the negative electrodes use a hydrogen-absorbing alloy instead of cadmium.
ECD Ovonics, half owner of Cobasys, was founded in 1960 by Stanford R. Ovshinsky, [5] a scientist and inventor, with his wife and collaborator Iris M. Ovshinsky. [6] [7] Mr. Ovshinsky invented a variation on the NiMH battery, and ECD Ovonics holds crucial patents on some types of NiMH battery technology, licensing them to all major NiMH battery producers.
Compared to NiMH battery where usable maximum continuous current drain is not more than 5C. Nickel–metal hydride batteries are the newest, and most similar, competitor to Ni–Cd batteries. Compared to Ni–Cd batteries, NiMH batteries have a higher capacity and are less toxic, and are now more cost effective.
Float voltage is the voltage at which a battery is maintained after being fully charged to maintain that capacity by compensating for self-discharge of the battery. [1] The voltage could be held constant for the entire duration of the cell's operation (such as in an automotive battery) or could be held for a particular phase of charging by the charger. [2]
Standard battery nomenclature describes portable dry cell batteries that have physical dimensions and electrical characteristics interchangeable between manufacturers. The long history of disposable dry cells means that many manufacturer-specific and national standards were used to designate sizes, long before international standards were reached.
The hands-free, cable-free technology provides electric semis 20 hours of power in 15 minutes.
A battery charger, recharger, or simply charger, [1] [2] is a device that stores energy in an electric battery by running current through it. The charging protocol—how much voltage and current, for how long and what to do when charging is complete—depends on the size and type of the battery being charged.