LED Emergency Lighting Supply Circuit?

Please mention the forward current and voltage specifications of the LEDs, so that it will be easier to reccomend you the exact solution.

Thanks for the reply,

I do no know the LED spec and the control boards have failed. There are two banks of LEDs 18 LEDs all in parallel in three banks of 6 drawing 20ma at 6v and a circular bank of 7 LEDs in parallel drawing 8ma at 6v. These banks can be one or the other or both off via a dptw switch. Sorry I cannot be more specific but I think the switch does not control the LEDs directly. Thinking of a circuit to tricle charge the battery, detect power failure and swithh on one of the banks of LEDs depending on the position of the switch.

hope that helps.

Gerald

For this cas, how you are getting sure that the driver is failed?

Discard the battery, use a similar voltage (6V) of the battery using a power adapter, turn on the LEDs, kindly check whether it is working or not?

Do you have multimeter, check the continuity of the switch as well.

It is very rare that LEDs driver circuit fails. Not sure about the charging circuit.

Kindly share confirmed information about the switch continuity, LEDs are ok or not and then whether connecting an external power supply same as the battery voltage working or not.

Switch working okay, LEDs working okay, works with external 6v supply for a few seconds when battery disconnected. A few components over heat in what I think is the power detect and charge circuit and a 1watt resistor on all boards has burnt out. The units are LLoytron D1002GR LED Emergency Rechargeable Lantern. I have tried to get hld of a circuit diagram but to no avail.

Can you post a image of the circuit?