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2. Automotive battery - Wikipedia

   en.wikipedia.org/wiki/Automotive_battery

   Car batteries became widely used around 1920 as cars became equipped with electric starter motors. [10] The first starting and charging systems were designed to be 6-volt and positive-ground systems, with the vehicle's chassis directly connected to the positive battery terminal. [11] Today, almost all road vehicles have a negative ground system ...

3. List of battery sizes - Wikipedia

   en.wikipedia.org/wiki/List_of_battery_sizes

   A Battery: Eveready 742: 1.5 V: Metal tabs H: 101.6 L: 63.5 W: 63.5 Used to provide power to the filament of a vacuum tube. B Battery: Eveready 762-S: 45 V: Threa­ded posts H: 146 L: 104.8 W: 63.5 Used to supply plate voltage in vintage vacuum tube equipment. Origin of the term B+ for plate voltage power supplies.

4. Automobile auxiliary power outlet - Wikipedia

   en.wikipedia.org/wiki/Automobile_auxiliary_power...

   The actual voltage, matching the car battery's voltage, will be approximately 12.5 volts when dormant (less in cold conditions), approximately 14.5 volts when the engine and the alternator/generator are operating (more when cold), and may briefly drop as low as 5–6 volts during engine start due to the high temporary battery current usage. [12]

5. Battery terminal - Wikipedia

   en.wikipedia.org/wiki/Battery_terminal

   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 compartment. Some lantern batteries instead feature screw terminals , while still others instead feature pin holes.

6. 15 coming electric cars we can't wait to drive - AOL

   www.aol.com/15-coming-electric-cars-cant...

   The Audi Q6 e-tron is the 11th battery electric model to join the brand's lineup and marks the debut of Audi's all-new EV platform. ... featuring an 800-volt battery and electric motors that can ...

7. 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]