What is a four-cell battery with the cells connected in series with each other?

How would it look like?

line up 4 AA cells, end to end, + to -.

That is an example of 4 cells in series.

Your 12V car batter is another good example of cells in series. I think each cell can charge up to 2.4V, so there are 5 or 6 cells. See

http://hyperphysics.phy-astr.gsu.edu/hbase/electric/leadacid.html

A four-cell battery with the cells connected in series means that the positive terminal of one cell is connected to the negative terminal of the next cell, and so on. This creates a single pathway for the electrical current to flow through all the cells.

Visually, a four-cell battery connected in series would look like a single unit with four individual cylindrical cells connected end-to-end. Each cell would have a positive and a negative terminal, and these terminals would be connected in a linear arrangement. This creates a longer overall battery unit with an increased voltage output.

A four-cell battery with the cells connected in series means that the positive terminal of one cell is connected to the negative terminal of the next cell, resulting in a chain-like configuration. The total voltage of the battery is the sum of the voltages of the individual cells.

To understand how it would look like, imagine four cylindrical batteries arranged in a row, with their positive terminals connected to the negative terminals of the neighboring cells. The outermost cells would have their positive and negative terminals exposed, while the inner cells would have their terminals connected internally.

Visually, it would resemble a longer battery, typically with a slightly larger length compared to a single-cell battery. The specific size and shape depend on the type of battery being used, such as AA, AAA, or others.