AC->Rechargeable batteries and power drain

OK, this is a very basic question and apology for the naiveness. We want to achieve 2 things -

  1. Have an AC supply to recharge, say a small (4?) group of AA rechargeable batteries.
  2. The Arduino needs to output a minimum of 6V & > 1.0 A to power a device.

Questions:

  1. How long, with a fully charged batter group, could the Arduino run the external device? assuming there is no other drains on the power, like LED etc.

Thanks,

Steve

Please be clear of the purpose.
Is this a battery backup for a mains supplied system ?

  1. The Arduino needs to output a minimum of 6V & > 1.0 A to power a device.

The Arduino can't do this. It can only control a switch (relay, transistor, etc.) which in turn controls power from another source to the device.

Boardburner2:
Please be clear of the purpose.
Is this a battery backup for a mains supplied system ?

Yes, in case the main supply (AC) gets cut off for a period of time.

Thanks

What kind of rechargeable batteries are going to be used?
4 X AA will only provide 4.8V if Nimh batteries are used.
Most Nimh AA batteries are around the 2400 Mah range, but you wont get anything
like that with a 1 A drain.
More likley around 40 minutes.
Id use 2 X 18650 panasonic Lipo cells in series which will give 7.5 V and around 3 AH capacity
and that will give around 3 hours @ 1 A drain.

geoview:
OK, this is a very basic question and apology for the naiveness. We want to achieve 2 things -

  1. Have an AC supply to recharge, say a small (4?) group of AA rechargeable batteries.
  2. The Arduino needs to output a minimum of 6V & > 1.0 A to power a device.

Questions:

  1. How long, with a fully charged batter group, could the Arduino run the external device? assuming there is no other drains on the power, like LED etc.

Thanks,

Steve

6V 1A , is this a continuous requiremnent ?

A 7 AH lead acid battery would give a standby of one hour in this case. Not cheap.
An arduino alone will draw only milliamps and should run off a similar battery for a couple of days..

You need to measure and state the actual current draw of your own circuit to make the calculation.