Make Your Own High Power Led Emergency Light with battery overcharge and deep discharge protection.
Make your own Led Emergency Light At Home
This is a very simple but high power led emergency light that runs on 4V, 4.5A rechargeable Lead-acid battery.
You will need:
W04 or 4 diodes connected as bridge rectifier
Resistor R1 - 1K (1/4w)
LED1 (Red colour to indicate power)
LED2 (4V 5W or 10W)
Step-down transformer - 9V,500mA
Connect the components as shown in the connection diagram. The charger board prevents overcharging and indicates deep discharge of the lead acid battery.