Update: Deal expired.
XANES 300LM Sensing Headlight Night Fishing Cycling Double Light Source Rechargeable Clip Cap Lamp is in preorder for $5.99. ~150 pcs left at that price. Main LED with reflector seems to be Cree XP-E, there’s also COB LED for diffused light. Package includes headband (not pictured) and apparently 2 USB cables.
IR sensor probably works similar to Boruit IR “sensor” headlamp - i.e. just for switching selected LED on and off. Description does not clarify that aspect.
Battery has standard 2 pin connector (same as used in small drones) and is easily replaceable.