ESMARTER T21 USB Rechargeable LED Headlamp – Super Bright, 5 Modes, Waterproof

Meet your go-to hands-free lighting companion for any adventure. The ESMARTER T21 LED Headlamp packs powerful T6 LED bulbs, a 180° adjustable beam, and a long-lasting 18650 lithium-ion battery into a lightweight, waterproof design — perfect for night fishing, hiking, camping, cycling, running, and more.

✦ Key Features

Super Bright T6 LED Bulbs – Up to 7 LED bulbs illuminate a range of 100 meters, giving you a wide, clear field of view in total darkness.
5 Versatile Lighting Modes – Switch between: Main light only | Side light only | All lights at normal brightness | All lights at full brightness | SOS strobe — ready for any situation.
180° Adjustable Beam Angle – Tilt the lamp head to direct light exactly where you need it, indoors or outdoors.
Waterproof Construction – Splash-proof and sealed battery compartment means rain, snow, or damp conditions won't slow you down.
USB Fast Charge & Long Runtime – Included USB charging cable powers the high-capacity 18650 battery for 8–12 hours of continuous use on a full charge.
Comfortable Adjustable Headband – High-quality elastic strap fits adults and children alike; non-slip design stays secure during active use.
20W Output | 3.7V Lithium-Ion | CE & RoHS Certified

✦ Ideal For

🎣 Night fishing & early morning angling
🏕️ Camping, hiking & trail running
🚴 Cycling & mountain biking
🔧 Workshop tasks, DIY repairs & utility work
🚶 Evening walks & outdoor exploration

✦ Specifications

Model	T21
LED Type	T6 LED Bulbs (7/5 bulbs)
Beam Angle	180°
Wattage	20W
Voltage	3.7V
Battery	18650 Lithium-Ion (included)
Runtime	8–12 hours (fully charged)
Lighting Modes	5
Waterproof	Yes
Charging	USB (cable included)
Certification	CE, RoHS
Country of Origin	Made in Mainland China

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✦ Safety & Standards

For guidance on safe use of portable lighting and batteries during outdoor activities, visit the U.S. Consumer Product Safety Commission (CPSC) for consumer product safety resources.

Frequently Asked Questions

Q: How long does the LED headlamp battery last on a single charge?

A: The ESMARTER T21 headlamp uses a high-capacity 18650 lithium-ion battery that supports 8–12 hours of use after a full charge, depending on which of the 5 lighting modes is selected. Lower brightness modes extend runtime significantly.

Q: Is this LED headlamp truly waterproof for fishing and hiking?

A: Yes! The T21 headlamp features a waterproof design with a sealed battery compartment to protect against splashing water, rain, and snow — making it a reliable choice for fishing, hiking, camping, and other outdoor activities in variable weather.

Q: How does the USB charging work, and is a cable included?

A: The headlamp charges via USB — simply connect the included USB cable to any standard USB power source (power bank, wall adapter, laptop, etc.). The 18650 lithium-ion battery supports fast charging for quick turnaround between uses.

Q: Can children wear this headlamp comfortably?

A: Absolutely. The adjustable elastic headband is designed to fit both adults and children comfortably. It's non-slip and easy to put on and take off, making it suitable for family camping trips and outdoor adventures.