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A lemon battery is a simple battery often made for the purpose of education. Typically, a piece of zinc metal (such as a galvanized nail) and a piece of copper (such as a penny) are inserted into a lemon and connected by wires. Power generated by reaction of the metals is used to power a small device such as a light-emitting diode (LED).
Using a multimeter set on the 9.99 volts DC max scale, and with nothing else connected to the battery (that is, when measuring the "open circuit" battery voltage), the meter reads about 2.8 volts, or about 0.7 volts per cell. It is not a very good battery; I measure a short circuit current of about 6 milliamperes.
This list is a summary of notable electric battery types composed of one or more electrochemical cells. Three lists are provided in the table. Three lists are provided in the table. The primary (non-rechargeable) and secondary (rechargeable) cell lists are lists of battery chemistry.
There are multiple setup options, too: Use the built-in rechargeable battery or connect it to existing doorbell wires. With 1080p resolution, two-way audio and lots of other useful features, this ...
With a 6.8-inch display, adjustable warm light, and up to 10 weeks of battery life, your son’s girlfriend can store thousands of titles on this tiny device. You can even offer to buy a few books ...
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Lemon oil aroma does not influence the human immune system, [44] but may contribute to relaxation. [45] An educational science experiment involves attaching electrodes to a lemon and using it as a battery to produce electricity. Although very low power, several lemon batteries can power a small digital watch. [46]
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