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2. List of battery sizes - Wikipedia

   en.wikipedia.org/wiki/List_of_battery_sizes

   Some versions have a tap at 22.5 volts. GB Battery: C Battery Eveready 761: 1.5 to 9 V: Threa­ded posts or banana sockets H: 76.2 L: 101.6 W: 31.75 Originally used in vintage vacuum tube equipment for grid bias. Still popular for school science class use as a variable voltage supply as the current version has several taps at 1.5 volt intervals ...

3. Oxygen ion battery - Wikipedia

   en.wikipedia.org/wiki/Oxygen_ion_battery

   Oxygen-ion batteries (Oi batteries) are a type of rechargeable battery that works similarly to lithium-ion batteries. The electrodes in oxygen-ion batteries are perovskite-based ceramics instead of typical lithium-ion battery materials (graphite, iron, etc.). The batteries are fire-resistant, and highly durable. [1] The ceramic materials do not ...

4. Oxygen concentrator - Wikipedia

   en.wikipedia.org/wiki/Oxygen_concentrator

   An oxygen concentrator takes in air and removes nitrogen from it, leaving an oxygen-enriched gas for use by people requiring medical oxygen due to low oxygen levels in their blood. [4] Oxygen concentrators provide an economical source of oxygen in industrial processes, where they are also known as oxygen gas generators or oxygen generation plants.

5. Duracell - Wikipedia

   en.wikipedia.org/wiki/Duracell

   Their two main battery brands are "CopperTop (Plus)," marketed as longer-lasting, and "Ultra," directed mainly at users of digital devices and devices that need more power. Duracell also makes some lithium batteries [21] and car batteries. [22] Various Procell batteries from the Alkaline & Intense product ranges

6. Button cell - Wikipedia

   en.wikipedia.org/wiki/Button_cell

   Button, coin, or watch cells. A button cell, watch battery, or coin battery is a small battery made of a single electrochemical cell and shaped as a squat cylinder typically 5 to 25 mm (0.197 to 0.984 in) in diameter and 1 to 6 mm (0.039 to 0.236 in) high – resembling a button.

7. Aluminium–air battery - Wikipedia

   en.wikipedia.org/wiki/Aluminium–air_battery

   Aluminium–air batteries (Al–air batteries) produce electricity from the reaction of oxygen in the air with aluminium. They have one of the highest energy densities of all batteries, but they are not widely used because of problems with high anode cost and byproduct removal when using traditional electrolytes.