Which battery is best for making a 20 white LED flash light for longer duration? 6V-4.7Ah or 12V-4Ah? Answered
I want to make a flash light using 20 white LEDs, I have one 6v-4.7Ah lead acid battery and one 12v-4Ah lead acid battery. Which battery is better to use for longer duration?Thank you, Wir.?