? TP4056 based charger board question?

Flashlight Modding and DIY Parts
1

I have a slew of TP4056 charger boards just sitting here. I have not used them because they have older USB-mini type sockets attached to the boards. They work fine but who uses USB-mini plugs anymore? Two in parallel can supply 2 amps.

I have a project idea that would use an LED like a Nichia 519 and a driver meant to be used with a 3.7-volt li-ion cell for power. But this light would not have any cells. I would simply want to run it off a USB power supply. A power pack or a module plugged into 120 VAC mains power.

If I was to use one of these TP4056 charger boards, with proper heat sinking, are there any disadvantages, any downsides to this idea? This would allow me to use up some of the boards I have managed to collect and, so far, not use, instead of buying a “proper” power supply.

I am wondering if it would be better to use them with the voltage output set to 3.6 volts instead of 4.2?

I guess I could also make a test setup and see how it works.

Thanks.

2

1. Yes it will work. It will not be very efficient and consume more power than needed, but it will work.

2. No actually. You want a higher voltage, not a lower one. Higher efficiency that way.