Desired LED Current: mA
LED Forward Voltage: V LEDs times volts per LED
Battery Input Voltage: V cells times volts per cell
Battery Capacity: mAh
Converter Efficiency: %
Runtime: hours

Runtime: hours minutes
Battery current draw: mA


This calculator uses a similar setup to the LED Pro application you may be familiar with. Enter any 5 of the 6 values at top of the page and hit Calculate. This will fill in the missing value. In addition, the runtime in hours and minutes and the current draw from the battery is shown below the buttons after a calculation is completed. Hope this helps someone out.

Ken Worster
Page last updated Thursday, July 17 2008 6:33:39 AM