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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 ...
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.
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.
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]
The fastest chargers often incorporate cooling fans to keep the cells from overheating. Battery packs intended for rapid charging may include a temperature sensor that the charger uses to protect the pack; the sensor will have one or more additional electrical contacts. Different battery chemistries require different charging schemes.
Title: Exhibit 46 Author: gshapiro Created Date: 9/16/2015 1:22:17 PM
Panasonic's fourth-generation Eneloop batteries, in AA and AAA sizes Panasonic Eneloop Smart & Quick Charger BQ-CC55 Sanyo Eneloop battery charger. Eneloop (Japanese: エネループ, Hepburn: Enerūpu), stylized as eneloop, is a brand of 1.2-volt low self-discharge nickel–metal hydride (NiMH) rechargeable batteries and accessories developed by Sanyo [1] and introduced in 2005.
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.