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2. AA battery - Wikipedia

   en.wikipedia.org/wiki/AA_battery

   An AA battery is composed of a single electrochemical cell that may be either a primary battery (disposable) or a rechargeable battery. Several different chemistries are used in their construction. The exact terminal voltage, capacity and practical discharge rates depend on cell chemistry; however, devices designed for AA cells will usually ...

3. Battery holder - Wikipedia

   en.wikipedia.org/wiki/Battery_holder

   A battery holder is either a plastic case with the shape of the housing moulded as a compartment or compartments that accepts a battery or batteries, or a separate plastic holder that is mounted with screws, eyelets, glue, double-sided tape, or other means. Battery holders may have a lid to retain and protect the batteries or may be sealed to ...

4. Battery terminal - Wikipedia

   en.wikipedia.org/wiki/Battery_terminal

   Most cylindrical dry batteries (such as the AA battery) have a projection at one end (positive) and a flat base (negative). These mate with metal strips or springs in the battery holder . Six-volt lantern batteries typically feature two coiled, cone-shaped spring terminals, designed to mate with flat contact plates on the inside of the battery ...

5. How-to: Make a PS360 controller - Engadget

   www.engadget.com/2007-05-01-how-to-make-a-ps360...

   Pull the gray casing off to reveal the silver battery and circuit board inside. Be careful not to bend the tabs between the batter and the board any more than you need to. Fire up the Dremel and ...

6. Mad scientist shrinks Arduino to size of an AA battery ...

   techcrunch.com/2016/04/19/aaduino

   Based on the Tiny328, AAduino takes the platform to its sexiest form factor yet: Turning a three-AA battery holder with two batteries in it — the third battery compartment holds the AAduino ...

7. Battery charger - Wikipedia

   en.wikipedia.org/wiki/Battery_charger

   A mobile phone plugged in to an AC adapter for charging. A battery charger, recharger, or simply charger, [ 1][ 2] is a device that stores energy in an electric battery by running current through it. The charging protocol—how much voltage, current, for how long and what to do when charging is complete—depends on the size and type of the ...