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  2. List of battery sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_battery_sizes

    There were two ⌀3.2 mm negative pins spaced 9.5 mm apart and two ⌀4.0 mm positive pins spaced 14.3 mm apart. Negative and positive pins were spaced 18.1 mm apart. It was used in some early transistor radio amplifiers with a Class B output stage, allowing the loud speaker to be connected between the amplifier output and the battery center tap.

  3. Comparison of commercial battery types - Wikipedia

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

    This is a list of commercially-available battery types summarizing some of their characteristics for ready comparison. ... 2.5 [50] 3.6 [51] 4.2 [50] 0.74

  4. Float voltage - Wikipedia

    en.wikipedia.org/wiki/Float_voltage

    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]

  5. Electric battery - Wikipedia

    en.wikipedia.org/wiki/Electric_battery

    An electric battery is a source of electric power consisting of one or more electrochemical cells with external connections [1] for powering electrical devices. When a battery is supplying power, its positive terminal is the cathode and its negative terminal is the anode. [2] The terminal marked negative is the source of electrons.

  6. Solid-state battery - Wikipedia

    en.wikipedia.org/wiki/Solid-state_battery

    The present chloride solid electrolyte systems can be divided into two types: Li 3 MCl 6 [57] [58] and Li 2 M 2/3 Cl 4. [59] M Elements include Y, Tb-Lu, Sc, and In. The cathodes are lithium-based. Variants include LiCoO 2, LiNi 1/3 Co 1/3 Mn 1/3 O 2, LiMn 2 O 4, and LiNi 0.8 Co 0.15 Al 0.05 O 2. The anodes vary more and are affected by the ...

  7. Battery Directive - Wikipedia

    en.wikipedia.org/wiki/Battery_Directive

    Rechargeable nickel–metal hydride AA batteries are among the types of batteries that the Battery Directive allows its general use.. The Directive 2006/66/EC of the European Parliament and of the Council of 6 September 2006 on batteries and accumulators and waste batteries and accumulators and repealing Directive 91/157/EEC, commonly known as the Battery Directive, regulates the manufacture ...

  8. AA battery - Wikipedia

    en.wikipedia.org/wiki/AA_battery

    A Li-ion 1.5V AA-size battery, sold by the Chinese company Kentli as "Kentli PH5" since 2014 and with similar batteries later available from other suppliers is a AA-sized battery housing containing a rechargeable 3.7 V Li-ion cell with an internal buck converter at the positive terminal to reduce the output voltage to 1.5 V. [19] The Kentli ...

  9. Vacuum tube battery - Wikipedia

    en.wikipedia.org/wiki/Vacuum_tube_battery

    A modified No. 6 cell was often used, later packs of multiple F-cells were used. In the early days of transistor radio, a single G-cell would often be used as the A battery. Eveready 762-S "B" battery with 45-volt & 22.5-volt tap screw terminals. The "B" battery is used to provide the plate voltage. It is sometimes colloquially referred to as a ...