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2. Nickel–hydrogen battery - Wikipedia

   en.wikipedia.org/wiki/Nickel–hydrogen_battery

   A nickel–hydrogen battery (NiH 2 or Ni–H 2) is a rechargeable electrochemical power source based on nickel and hydrogen. [5] It differs from a nickel–metal hydride (NiMH) battery by the use of hydrogen in gaseous form, stored in a pressurized cell at up to 1200 psi (82.7 bar) pressure. [6]

3. Comparison of commercial battery types - Wikipedia

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

   NiMH Ni-MH Metal hydride: KOH Yes 1990 [1] 0.9–1.05 [26] 1.2 [11] 1.3 [26] 0.36 (100) [11] 1.44 (401) [32] 250–1,000 2.65 (378) [1] 30 [33] Low self-discharge nickel–metal hydride: LSD NiMH Yes 2005 [34] 0.9–1.05 [26] 1.2 1.3 [26] 0.34 (95) [35] 1.27 (353) [36] 250–1,000 0.42 [33] Lithium–manganese dioxide: Lithium Li-MnO 2 CR Li-Mn ...

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–metal hydride battery - Wikipedia

   en.wikipedia.org/wiki/Nickel–metal_hydride_battery

   Lithium batteries produce a higher voltage (3.2–3.7 V nominal), and are thus not a drop-in replacement for AA (alkaline or NiMh) batteries without circuitry to reduce voltage. Although a single lithium cell will typically provide ideal power to replace 3 NiMH cells, the form factor means that the device still needs modification.

6. AAA battery - Wikipedia

   en.wikipedia.org/wiki/AAA_battery

   AAA batteries showing both alkaline (LR03) and zinc (R03) versions D, C, AA, AAA, AAAA, 9-Volt batteries The AAA battery (or triple-A battery ) is a standard size of dry cell battery . One or more AAA batteries are commonly used in low-drain portable electronic devices.

7. List of battery sizes - Wikipedia

   en.wikipedia.org/wiki/List_of_battery_sizes

   Lithium-ion AA 700–1,000 [178] [179] 14: 53 Similar size as AA cell. Those with a protection circuit are slightly longer. Used in many LED flashlights. Nominal voltage is 3.7 V. Variants include: Shorter Li-ion cell with a step-down converter to 1.5 V, e.g. Kentli 2,800 mAh. [180] Non-rechargeable LS14500 primary cell (SAFT: 2,600 mAh, 3.6 V ...