Increasing voltage from 4.5 (actual 4.9) to 12 volts; Answered
What resistor should I add on to the current setup?
Two sets of white LED (each removed from flashlight) run in parallel to the 3-AA battery source. The neg or current connection is the spring (or resistor) that came with the flashligt. I would like to use a 12 volt rechargable lead acid battery.?