Recently, we've been asked a questions about batteries. There are a few things that you'll need to know to answer this question. The first is about current, resistance, and voltage. Current is the actual amount of electricity flowing through the circuit. Resistance is anything that tries to stop or slow down the electricity.
Voltage is a little trickier.
Voltage is the potential to move. If a charge has a higher voltage, it is more likely to move. So if you have a high potential, then there will be more current because it will be easier for the charges to flow. The second important thing relates currect, resistance, and voltage together. It is called Ohm's Law.