Question

we should not connect too many battries in a circuit .why​

Answer 1

Answer:

there is possibility of overload that's it :)

Answer 2

Answer:

Two or more cells can be connected end-to-end to make a battery. A typical cell has a voltage of 1.5 volts (we write this as 1.5 V). By connecting cells in series, we can makes batteries with 3 V, 6 V and so on.

Each battery is labelled with its voltage. This tells us about the ‘push’ it gives to make the current flow.

A 6 V battery gives a bigger push than a 1.5 V cell.

Sometimes we call a single cell a ‘battery’, although technically we ought to say 'cell'.