12-12-11, 09:12 PM
I'm no expert but I'll give an opinion anyway and maybe get corrected.
The 60w from 12v would be drawing approx 5amps. (Not 5ah, as in ampere hours, if that's what you meant).
If you linked the two 12v batteries together in series you would have the equivalent of a 24v battery as you say. However as I see it the draw from each battery would be 450ma. (I'm in disagreement with rustyrider here).
Only if you linked two matched batteries in parallel would you divide the current between them. In this case it would still be 12 volts so each still taking 450ma.
You could just run the light off one 12v battery and at 900ma you would have a good number of hours between charges with a normal leasure battery.
The 60w from 12v would be drawing approx 5amps. (Not 5ah, as in ampere hours, if that's what you meant).
If you linked the two 12v batteries together in series you would have the equivalent of a 24v battery as you say. However as I see it the draw from each battery would be 450ma. (I'm in disagreement with rustyrider here).
Only if you linked two matched batteries in parallel would you divide the current between them. In this case it would still be 12 volts so each still taking 450ma.
You could just run the light off one 12v battery and at 900ma you would have a good number of hours between charges with a normal leasure battery.