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  2. Nine-volt battery - Wikipedia

    en.wikipedia.org/wiki/Nine-volt_battery

    Battery chargers are devices that charge batteries, some of which may also be able to charge nine-volt batteries. Whether a charger can charge the battery depends largely on the dimensions of the battery and internal chemistry (I.E., disposable batteries cannot be charged). Testing a nine-volt battery can be done using a multi-meter by probing ...

  3. Smoke detector - Wikipedia

    en.wikipedia.org/wiki/Smoke_detector

    Batteries are used either as sole or as backup power for residential smoke detectors. Mains-operated detectors have disposable or rechargeable batteries; others run only on 9-volt disposable batteries. When the battery is exhausted, a battery-only smoke detector becomes inactive; most smoke detectors chirp repeatedly if the battery is low in power.

  4. List of battery sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_battery_sizes

    This battery, introduced in 1901, was very common in continental Europe until the 1970s. It usually contains three B cells in series. In Switzerland as of 2008, 4.5-volt batteries account for only 1% of primary battery sales. [89] PP3, 9-volt, or E [90] Radio battery Smoke alarm battery Square battery Transistor battery 006P MN1604

  5. Rechargeable alkaline battery - Wikipedia

    en.wikipedia.org/wiki/Rechargeable_alkaline_battery

    The first generation rechargeable alkaline batteries were introduced by Union Carbide and Mallory in the early 1970s. [3] [5] Several patents were introduced after Union Carbide's product discontinuation and eventually, in 1986, Battery Technologies Inc of Canada was founded to commercially develop a 2nd generation product based on those patents, under the trademark "RAM".

  6. Category:Rechargeable batteries - Wikipedia

    en.wikipedia.org/.../Category:Rechargeable_batteries

    This page was last edited on 25 October 2022, at 04:26 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.

  7. Vacuum tube battery - Wikipedia

    en.wikipedia.org/wiki/Vacuum_tube_battery

    The battery's life in the radio is essentially its shelf life. In more recent times, they were popular in schools and colleges as a convenient variable voltage source in science classes. EverReady was still manufacturing them in the 1970s. The most popular battery is the 9-volt type with taps every 1 + 1 ⁄ 2 volts that accept banana plugs. [1 ...

  8. State of charge - Wikipedia

    en.wikipedia.org/wiki/State_of_charge

    In a battery electric vehicle (BEV), the state of charge indicates the remaining energy in the battery pack. [4] It is the equivalent of a fuel gauge.. The state of charge can help to reduce electrical car's owners' anxiety when they are waiting in the line or stay at home since it will reflect the progress of charging and let owners know when it will be ready. [5]

  9. 9V - Wikipedia

    en.wikipedia.org/wiki/9V

    English. Read; Edit; View history; Tools. ... 9V or 9-V may refer to: Nine-volt battery; Killed by 9V Batteries, an Austrian indie rock band; PG-9V, a model of the ...