How long can a 12v 3w led light runs on a 12v 9ah battery?
I have a 12v 3w led light and a 12v 9ah bettery. how long will the battery last?? If i add additional led light, how do i calculate the time?
Public Comments
- 3 t = 12 x 9
t = 36
- W = E * I
E = 12 V
W = 3 W
3 = 12* I
3/12 = I
0.25 amps = I
The battery can deliver 9 ampere hours.
9 ampere hours = 0.25 amps * x hours
9/0.25 = 36 hours = x
