I don't think anyone has mentioned this, but this unit likely will not work in stock form for LED mods. On page three of the spec sheet it states:
1.1 Operation (Continue)
Due to the high threshold voltage of some LEDs it is advised that the AZB0152 is used in 3-wire mode (Fig1-
2D). The AZB0152 can be ordered with a mask selectable 3-wire interface, GND, PWR and LOAD (Fig1-
2D) providing the same functions as in 2-wire interface.
The way this item works is pretty clever, but not so good for any LED mod. It momentarily disconnects the bulb from the battery. During that brief interval, the device is powered up from the battery with the bulb acting as a resistor. It then reconnects the load. Repeat. Since all the leds cause high voltage drops, the circuit will likely not get enough residual voltage (bettery - Vf of LED) to operate, hence the need of a third connection. Unless one has an incredibly thin, but insulated wire to snake up the battery chamber, count this device out for LED users. I'm not sure how convertor boards will react - it depends on the circuit.