I have a similar (sort of ) question. I have a DC battery charger that puts out 57.1 volts and can deliver a maximum of 3 amps. I want to use it to charge a battery pack to which I only want to apply 54.6 volts. Rather than try to mod the charger, is it feasible to put a resistor or a rheostat or other on the positive output leg of the charger to drop the voltage by (57.1-54.6) 2.5 volts to the load (battery being charged)?
Being a novice, I would assume resistance of 2.5/3.0 = .83 ohms? but capable of handling (2.5 x 3.0) = 7.5 watts? If so, what would be the best type to buy for this? Or am I out to lunch on this approach?
Being a novice, I would assume resistance of 2.5/3.0 = .83 ohms? but capable of handling (2.5 x 3.0) = 7.5 watts? If so, what would be the best type to buy for this? Or am I out to lunch on this approach?