Projecta HDBC20 Manual page 13

Q. What are Volts and Amps?
VOLTS
The term voltage refers to the electrical force or electric potential to do work between two terminals or a good
analogy is water pressure in a pipe. For example a battery has 12 Volts between the positive and negative
terminals, or a 6 Volt battery has 6 Volts between the positive and negative terminals.
AMPS
The term AMPS is the unit of measure used for current. Which can be described as the flow of electric charge in
a circuit. Again if you use the water analogy this would refer to how much water is flowing through the pipe.
For example if the current is reading 12 Amps then this is the amount of energy going into the battery.
Q. How does a typical battery charge?
A. A typical flat battery has a low internal resistance, when first connected to a charger the battery will accept a
high current. As the battery slowly charges, the voltage and internal resistance will rise causing the battery to
accept less and less current.
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