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2. Nine-volt battery - Wikipedia

   en.wikipedia.org/wiki/Nine-volt_battery

   Nine-volt battery. The nine-volt battery, or 9-volt battery, is an electric battery that supplies a nominal voltage of 9 volts. Actual voltage measures 7.2 to 9.6 volts, depending on battery chemistry. Batteries of various sizes and capacities are manufactured; a very common size is known as PP3, introduced for early transistor radios.

3. 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

4. Electric battery - Wikipedia

   en.wikipedia.org/wiki/Electric_battery

   An electric battery is a source of electric power consisting of one or more electrochemical cells with external connections [ 1 ] for powering electrical devices. When a battery is supplying power, its positive terminal is the cathode and its negative terminal is the anode. [ 2 ] The terminal marked negative is the source of electrons that will ...

5. Automotive battery - Wikipedia

   en.wikipedia.org/wiki/Automotive_battery

   Automotive battery. A typical 12 V, 40 Ah lead-acid car battery. An automotive battery, or car battery, is a rechargeable battery that is used to start a motor vehicle. Its main purpose is to provide an electric current to the electric-powered starting motor, which in turn starts the chemically-powered internal combustion engine that actually ...

6. Nickel–cadmium battery - Wikipedia

   en.wikipedia.org/wiki/Nickel–cadmium_battery

   Thomas Edison patented a nickel– or cobalt–cadmium battery in 1902, [3] and adapted the battery design when he introduced the nickel–iron battery to the US two years after Jungner had built one. In 1906, Jungner established a factory close to Oskarshamn, Sweden to produce flooded design Ni–Cd batteries.

7. Wikipedia:Reference desk/Archives/Miscellaneous/2007 January ...

   en.wikipedia.org/wiki/Wikipedia:Reference_desk/...

   If you add one more battery to the series, you'll get 10.5 volts; the car will go faster, and its capacitors will probably explode after a while of usage. My ultimate recommendation would be to find rechargeable 9.6v battery packs on the internet - you can recharge them, and they're the exact voltage you need. V-Man737 06:31, 19 January 2007 (UTC)