ESMARTER COB Keychain Work Light – Pocket-Sized Power for Every Adventure

Meet your ultimate everyday carry light. The ESMARTER COB Keychain Work Light packs high-lumen LED brightness, a built-in battery display, and 8 versatile lighting modes into a compact, clip-on design that goes wherever you go — camping, hiking, running, or fixing things around the house.

8 Lighting Modes for Every Situation

One-handed operation makes it effortless to cycle through all modes with a single button:

Mode 1: High-brightness white light
Mode 2: Low-brightness white light
Mode 3: High-brightness warm light
Mode 4: Low-brightness warm light
Mode 5: Solid red light (ideal for signaling or safety visibility)
Mode 6: Flashing red light (attention-grabbing for emergency alerts)
Mode 7 & 8: Additional brightness/flash combinations for versatile use

Long-Lasting Battery with Smart Display

The built-in 500mAh lithium battery delivers approximately 2 hours at maximum brightness and up to 5 hours at low brightness. A handy battery-level display means you'll always know exactly how much charge is left — no more surprise blackouts on the trail. Recharges fully in about 1 hour via USB Type-C.

Compact, Portable & Keychain-Ready

Clip it to your keys, backpack, belt loop, or tent zipper. The lightweight COB LED design provides wide-angle illumination that outperforms traditional single-point LEDs — perfect for reading maps, navigating campsites, or working in tight spaces.

Key Features at a Glance

✅ COB LED technology for wide, bright coverage
✅ 8 lighting modes including white, warm, red, and flashing
✅ Battery percentage display
✅ USB Type-C rechargeable – no disposable batteries needed
✅ 500mAh lithium battery included
✅ One-button operation for easy one-handed use
✅ Keychain clip for hands-free portability
✅ Great for camping, hiking, running, emergencies & everyday carry

Specifications

Brand	ESMARTER
Model	W5138
Light Source	COB LED
Battery	500mAh Lithium (included)
Charging	USB Type-C (~1 hour)
Runtime	2 hrs (high) / 5 hrs (low)
Modes	8
Country of Origin	Made in China

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For tips on safe outdoor lighting and camping preparedness, visit Ready.gov – Emergency Supply Kit Guide.

Frequently Asked Questions

Q: How many light modes does the ESMARTER COB Keychain Work Light have?

A: It features 8 lighting modes, including high and low brightness white light, high and low brightness warm light, solid red light, and flashing red light — all accessible with a single button for easy one-handed cycling.

Q: How long does the battery last and how do I recharge it?

A: The built-in 500mAh lithium battery provides approximately 2 hours of runtime at maximum brightness and up to 5 hours at the lowest setting. It recharges via USB Type-C in about 1 hour.

Q: Can I see how much battery is remaining?

A: Yes! The keychain light includes a battery level display so you can check remaining charge at a glance, ensuring you're never caught off guard in the dark.

Q: Is this light suitable for camping and outdoor use?

A: Absolutely. Its compact keychain clip design, wide-angle COB LED illumination, red signaling modes, and long battery life make it an excellent companion for camping, hiking, running, and everyday outdoor adventures.