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  2. Series and parallel circuits - Wikipedia

    en.wikipedia.org/wiki/Series_and_parallel_circuits

    If the cells of a battery are connected in parallel, the battery voltage will be the same as the cell voltage, but the current supplied by each cell will be a fraction of the total current. For example, if a battery comprises four identical cells connected in parallel and delivers a current of 1 ampere , the current supplied by each cell will ...

  3. Two capacitor paradox - Wikipedia

    en.wikipedia.org/wiki/Two_capacitor_paradox

    Two identical capacitors are connected in parallel with an open switch between them. One of the capacitors is charged with a voltage of V i {\displaystyle V_{i}} , the other is uncharged. When the switch is closed, some of the charge Q = C V i {\displaystyle Q=CV_{i}} on the first capacitor flows into the second, reducing the voltage on the ...

  4. Electrochemical cell - Wikipedia

    en.wikipedia.org/wiki/Electrochemical_cell

    Both galvanic and electrolytic cells can be thought of as having two half-cells: consisting of separate oxidation and reduction reactions. When one or more electrochemical cells are connected in parallel or series they make a battery. Primary cells are single use batteries.

  5. Battery pack - Wikipedia

    en.wikipedia.org/wiki/Battery_pack

    A battery pack is a set of any number of (preferably) identical batteries or individual battery cells. [1] [2] They may be configured in a series, parallel or a mixture of both to deliver the desired voltage and current. The term battery pack is often used in reference to cordless tools, radio-controlled hobby toys, and battery electric vehicles.

  6. Uninterruptible power supply - Wikipedia

    en.wikipedia.org/wiki/Uninterruptible_power_supply

    Battery strings wired in series-parallel can develop unusual failure modes due to interactions between the multiple parallel strings. Defective batteries in one string can adversely affect the operation and lifespan of good or new batteries in other strings.

  7. Battery isolator - Wikipedia

    en.wikipedia.org/wiki/Battery_isolator

    A battery isolator is an electrical device that divides direct current (DC) into multiple branches and only allows current in one direction in each branch. The primary benefit of such an arrangement is the ability to simultaneously charge more than one battery from a single power source (e.g., an alternator) without connecting the battery terminals together in parallel.

  8. Galvanic cell - Wikipedia

    en.wikipedia.org/wiki/Galvanic_cell

    Large central office battery rooms – in a telephone exchange to provide power for subscribers' land-line telephones, for instance – may have many cells, connected both in series and parallel: Individual cells are connected in series as a battery of cells with some standard voltage (c. 40 V), and banks of such serial batteries, themselves ...

  9. Battery balancing - Wikipedia

    en.wikipedia.org/wiki/Battery_balancing

    Battery balancing and battery redistribution refer to techniques that improve the available capacity of a battery pack with multiple cells (usually in series) and increase each cell's longevity. [1] A battery balancer or battery regulator is an electrical device in a battery pack that performs battery balancing. [ 2 ]

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