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  2. Battery holder - Wikipedia

    en.wikipedia.org/wiki/Battery_holder

    Battery types such as the 9-volt have snap-on contacts. Battery holders for zinc-air batteries must not be completely air-tight since approximately 1 litre of air is required per ampere-hour of discharge per cell. The battery holder may include a valve integrated with the device power switch to allow air to be admitted when the device is ...

  3. Battery indicator - Wikipedia

    en.wikipedia.org/wiki/Battery_indicator

    An ESR meter known not to have diode protection will give a reading of internal resistance for a rechargeable or non-rechargeable battery of any size down to the smallest button cells which gives an indication of the state of charge. To use it, measurements on fully charged and fully discharged batteries of the same type can be used to ...

  4. Civil defense Geiger counters - Wikipedia

    en.wikipedia.org/wiki/Civil_defense_Geiger_counters

    There was also a training unit, [6] which measured 0–300 mR/h, and ran on four 30 volt batteries plus one 1.5 V cell for the filaments. This meter used a large Geiger–Müller tube, as opposed to the ionisation chamber of the RSM No. 2. These meters were favoured, as they had been tested on fallout in Australia after Operation Buffalo ...

  5. Battery management system - Wikipedia

    en.wikipedia.org/wiki/Battery_management_system

    A battery management system (BMS) is any electronic system that manages a rechargeable battery (cell or battery pack) by facilitating the safe usage and a long life of the battery in practical scenarios while monitoring and estimating its various states (such as state of health and state of charge), [1] calculating secondary data, reporting that data, controlling its environment ...

  6. CD V-700 - Wikipedia

    en.wikipedia.org/wiki/CD_V-700

    A drop-in replacement for the EON 6210 or the 6993 tube is the LND 720, manufactured by LND, Inc. of New York, USA. CD V-700M Geiger counter with alpha-sensitive end-window probe, also displaying protective red cap for the probe window and typical calibration decals. In this example, the meter face is altered to display Counts Per Minute only.

  7. Battery tester - Wikipedia

    en.wikipedia.org/wiki/Battery_tester

    Battery tester. A battery tester is an electronic device intended for testing the state of an electric battery, going from a simple device for testing the charge actually present in the cells and/or its voltage output, to a more comprehensive testing of the battery's condition, namely its capacity for accumulating charge and any possible flaws affecting the battery's performance and security.

  8. Charge controller - Wikipedia

    en.wikipedia.org/wiki/Charge_controller

    A shunt charge controller or shunt regulator diverts excess electricity to an auxiliary or "shunt" load, such as an electric water heater, when batteries are full. [7] Simple charge controllers stop charging a battery when they exceed a set high voltage level, and re-enable charging when battery voltage drops back below that level.

  9. Nickel–iron battery - Wikipedia

    en.wikipedia.org/wiki/Nickel–iron_battery

    Fully charging a NiFe cell consists of seven hours at the normal cell rate. In service the amount of charge given is governed by the extent of the previous discharge. For example, a battery discharged one-half, allows a 3.5 hour normal rate charge. Overcharging wastes current and causes rapid evaporation of the water in the electrolyte.

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