If it sometimes doesn’t turn on in low brightness it’s the amc7135 chip. Open a dispute
The problem doesn’t really bother me. When the torch is in a bright environment it wont turn on on low, unless I cover the LED’s for a second. The standby current is 87 μA with the button LED on high - which seems to be normal.
I would at least get in contact with Mateminco and ask for a replacement driver. If the driver were to fail it would cost $20.5 + shipping.
Wow, that is odd.