velohead66

Non Car Related..

Q1 - If I have 1x 1.5 volt battery - how many volts & amps will/can this push out.

Q2 - 2x 1.5 batteries back to back (serial ?) - how many volts & amps will/can this push out.

Q3 - 2x 1.5 batteries side to side (parallel ?) - how many volts & amps will/can this push out.

Thx.

john_s

iTrader: (1)

Q1: 1 x 1.5V battery will give 1.5 volts and as many amps as it can until the internal resistance of the battery becomes an issue.

Q2: In serial, you'll get 3V and the same maximum current (with 2x the internal battery resistance).

Q3: in parallel, you'll still get 1.5V, but twice the current from Q1 (internal resistance effectively halved / half the current from each battery).

Going back to A Level physics, we did once measure the internal resitance of a battery, but I can't rememberwhat it was.

If you're thinking in terms of current over a period of time, that will depend on the amp-hour capacity of the batteries in question.

John.

velohead66

good answer, crystal clear now.

Thanks.

scooby546

iTrader: (1)

Also battery types are an issue - 1.5v suggests you're using alkalines or equivalent; if you need more current & can make do with less voltage use Nickel Cadmium rechargeables - they run at 1.2 v but have a much lower internal resistance and are capable of greater amperage (if thats a word..) also the voltage is more stable for longer; alkalines tend to tail off gradually whereas NiCds will drop initially a little but then retain a little over 1v or so (per cell) for ages until they are nearly flat, then it will drop off rapidly as the cell gives up the ghost

john_s

iTrader: (1)

More current?

John.