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NiCd NiCad Cadmium: KOH Yes c. 1960 [26] 0.9–1.05 [27] 1.2 [28] 1.3 [27] 0.11 (30) [28] 0.36 (100) [28] 150–200 [29] 10 [14] Nickel–hydrogen: NiH 2 Ni-H 2: Hydrogen: KOH Yes 1975 [30] 1.0 [31] 1.55 [29] 0.16–0.23 (45–65) [29] 0.22 (60) [32] 150–200 [29] 5 [32] Nickel–metal hydride: NiMH Ni-MH Metal hydride: KOH Yes 1990 [1] 0.9 ...
Nickel–zinc batteries have a charge–discharge curve similar to 1.2 V NiCd or NiMH cells, but with a higher 1.6 V nominal voltage. [5]Nickel–zinc batteries perform well in high-drain applications, and may have the potential to replace lead–acid batteries because of their higher energy-to-mass ratio and higher power-to-mass ratio – as little as 25% of the mass for the same power. [6]
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]
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.
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.
Model-aircraft or -boat builders often take much larger currents of up to a hundred amps or so from specially constructed Ni–Cd batteries, which are used to drive main motors. 5–6 minutes of model operation is easily achievable from quite small batteries, so a reasonably high power-to-weight figure is achieved, comparable to internal ...
NiCd: KR03 24K 1.25 300–500: 0.38–0.63: Yes NiMH: HR03 24H 1.25 600 ... Brand Neutral Drawing Of NiMH AAA Battery based on ANSI Specifications Archived 2021-01-08 ...
Rapid chargers can typically charge cells in two to five hours, depending on the model, with the fastest taking as little as fifteen minutes. Fast chargers must have multiple ways of detecting when a cell reaches full charge (change in terminal voltage, temperature, etc.) to stop charging before harmful overcharging or overheating occurs.