How does the voltage of the combination compare with the voltage of a single battery?

Answer 1

actually, if you know superposition, a quick analysis would show that voltage sources in parallel would confound the circuit, as voltage sources become a short when you turn them off. in reality, there is internal resistance in the sources. the voltage output of two sources in parallel is the sum of the sources divided by the number of sources.
e.g. a 6V, 2V, and 1V DC source are wired so they are all in parallel. the output voltage at the terminals is 3 volts
(6+2+1)/3

as others have pointed out, if they were in series, you'd just sum up the voltages.

Answer 2

If two identical batteries are connected in series the voltage is doubled. If connected in parallel the output voltage is the same (common node at each terminal) but the capacity is doubled.

Answer 3

If connected in series (end to end) the voltage is doubled, if connected parallel, the voltage remains the same

Answer 4

If connected in series, voltages add up. In other words, if you connect a 1.5v battery and a 3v battery in series, you get 4.5v.

Click below to see a "series" orientation
http://www.vonwentzel.net/Battery/00.Glossary/series.gif


If connected in parallel, you get the lowest voltage of all the batteries, but in return, you get more current. In other words, if you connect a 1.5v battery and 3v battery in parallel, you get 1.5v.

People generally don't connect batteries of different voltages in parallel.

Click below to see a "parallel" orientation.
http://www.price1.com/images/clearance/parallel.gif

Hope this answers your question.

Mahurshi Akilla

Read this if you have more time:
http://van.physics.uiuc.edu/qa/listing.php?id=1322

Answer 5

If you connect them in series, the voltages can be added up.

Answer 6

Combination in series ? or in parallel ?
You will either have greater voltage {series} or
Greater amperage {parallel} , depending on the set up .