Sorry friend, I wanted to help you earlier, but I forgot.
Maybe 3 Amps or maybe not.
All COB 100W LED’s that I’ve seen look different.
Typically, a COB 100W LED has 10 serial connected chips (32V-36V) and 10 parallel lines of 300mA each (300 x 10 = 3Amp).
Your LED has 10 serial connected chips (if 3.2V-3.6V x 10 = 32V-36V) and 5 parallel lines (if one line is 300mA x 5 = 1500mA). And maybe the power of the LED is 32V-36V x 1.5A = 48W-54W.
Let’s move on to the driver.
Drivers in LED lamps operate in “constant current” (CC) mode. Therefore, it has 44V output, this is normal. To check the driver, you need to connect it to the LED through the ammeter according to the scheme as in the picture.
And connect the battery pack directly to the driver for 3-4 seconds.
If it works, you can measure the current and find out the power of the driver and LED. (You can tell us, I’m curious).
If it does not work, you need to connect any other power source 12V 10A (As in the picture).
If it still doesn’t work, you need a new driver.
Battery Pack:
To check the battery pack you need to load a current of 4-6 Amp.
You may need to measure the capacity of the battery pack.
And I do not see the BMS Board. Perhaps it is on the underside of the battery pack.
I’m wondering what is the runtime of this spotlight on a charged battery - 30 minutes?
The problem may also be in the three-pin charging connector.
If the negative wire of the battery is connected to pin 3 and the negative wire of the Driver is connected to pin 2, contact may be lost between them.
I do not see how connected, a lot of hot glue.
You also need to check the power switch.
We are waiting for the results.
Sorry if there are a lot of mistakes and bad english.