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2. Nickel–metal hydride battery - Wikipedia

   en.wikipedia.org/wiki/Nickel–metal_hydride_battery

   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.

3. Comparison of commercial battery types - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_commercial...

   1.1–1.8 (300–500) [8] 2 [6] Alkaline: Zn/ MnO 2 LR KOH Manganese (IV) oxide: No 1949 [9] 0.9 [10] 1.5 [11] 1.6 [10] 0.31–0.68 (85–190) [12] 0.90–1.56 (250–434) [12] 50 [12] 0.39 (2574) [12] 45–85 [12] 0.17 [12] 5–10 [4] Rechargeable alkaline: RAM KOH Yes 1992 [13] 0.9 [14] 1.57 [14] 1.6 [14] <1 [13] Silver-oxide: SR NaOH/ KOH ...

4. Eneloop - Wikipedia

   en.wikipedia.org/wiki/Eneloop

   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.

5. Nickel–hydrogen battery - Wikipedia

   en.wikipedia.org/wiki/Nickel–hydrogen_battery

   The open-circuit voltage is 1.55 V, the average voltage during discharge is 1.25 V. [9] While the energy density is only around one third as that of a lithium battery, the distinctive virtue of the nickel–hydrogen battery is its long life: the cells handle more than 20,000 charge cycles [4] with 85% energy efficiency and 100% faradaic efficiency.

6. Nickel–zinc battery - Wikipedia

   en.wikipedia.org/wiki/Nickel–zinc_battery

   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]

7. List of battery types - Wikipedia

   en.wikipedia.org/wiki/List_of_battery_types

   Polysulfide–bromide battery; Rechargeable alkaline battery; Rechargeable fuel battery; Sand battery; Silver–zinc battery; Silver–calcium battery; Silver–cadmium battery; Sodium-ion battery; Sodium–sulfur battery; Solid-state battery [4] Super iron battery; Wet cell; Zinc ion battery