05-20-2007, 03:55 PM
It occurred to me that you might like to figure out for yourself, how long sonar duration another battery will provide, where the capacity of the cells is different from the examples I have given.
Here is the formula:
Duration (in minutes) = battery capacity(amps) x 60 / max amp draw.
So for example ... a 7Ah gel cell :
7 x 60 / .7 = 600 minutes, which = 10 hours
Model batteries give capacity in milliamps.
So for them you must divide the result by 1000 to convert it into amps.
Like this:
Sanyo 3600s (3600 mAh capacity) (3.6 amp capacity) made into a pack ....
3600 x 60 / 1000 x .7 (or your amp draw) = 308 minutes, which is the same as 5 hours 8 mins.
[signature]
Here is the formula:
Duration (in minutes) = battery capacity(amps) x 60 / max amp draw.
So for example ... a 7Ah gel cell :
7 x 60 / .7 = 600 minutes, which = 10 hours
Model batteries give capacity in milliamps.
So for them you must divide the result by 1000 to convert it into amps.
Like this:
Sanyo 3600s (3600 mAh capacity) (3.6 amp capacity) made into a pack ....
3600 x 60 / 1000 x .7 (or your amp draw) = 308 minutes, which is the same as 5 hours 8 mins.
[signature]