Black baseball cap with the lamp under the brim

YH301 rechargeable baseball cap light

Model YH301

Battery: Polymer 3.7V, 300 mAh
Output: About 70 lm ±15% at full brightness, depending on battery level
Power: 0.5W ±15% at full brightness

YH301 is fitted beneath a baseball-cap brim and aims light down toward the task. The removable rechargeable lamp keeps both hands free for night work and outdoor activities.

Under-brim, downward beam
3 × 2835 LEDs
About 70 lm
IPX4

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Specifications

Model: YH301 rechargeable hat light
Battery: Polymer 3.7V, 300 mAh
Charging: USB-C. Full in 1–2 hours. Red while charging, green when full.
Standby: Less than 20 µA
Switch: Trigger button
Modes: 100% full, 50%, 25%, SOS, off
LED: 3 × 2835, 6500K
Output: About 70 lm ±15% at full brightness, depending on battery level
Power: 0.5W ±15% at full brightness
Runtime: Full about 2.5 hours; half about 4–5 hours; low about 8–10 hours. Brightness falls if left on.
Cycle life: More than 500 cycles
Temperature: −20°C to 45°C. Below −20°C the battery only charges and discharges about 60%.
Ingress: IPX4
Cover: PC, transparent
Housing: PP. The sheet lists the lamp housing as blue; the module shown is the black unit aimed downward.
Fixing ring: PVC, black
USB plug: Rubber, black

Figures are from the YH301 electrical design sheet. The lamp is fitted under the baseball-cap brim; other knit-cap lights are listed as separate products.