sentence: Voltage is the pressure pushing the electrons through the wires, it is measured in volts.
sentences_before: Connecting the positive of one cell to the positive of the other, and the negative to the negative is called connecting them 'in parallel'. The voltage stays the same, but the current is added together.
sentences_after: Current is how many electrons can go at once, it is measured in amps.
concept_name: voltage
headings: Battery What is inside a battery (the chemistry)