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Manual

RECHARGEABLE HEADLIGHT

HL-EL042RC

Design Pat. Pending

Copyright© 2021 CATEYE Co., Ltd.
HLEL042RC-210305  

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OK

NO!

360°

*2

(MICRO USB)

(AMPP200)

LITHIUM-ION BATTERIES

Recharge the battery for first time use or after long period of storage:
The voltage of the battery may drop due to self-discharge during long 

period of storage. Always fully charge the battery before use.
Cautions for charging and usage:

• Using a PC or USB battery charger with an output current of 500 mA or 

more is recommended for charging.

• Be sure that no dust or other foreign objects are attached to the plug of 

the USB cable before charging. 

• Do not subject the light to vibrations while charging.
• When your PC is in sleep state, the unit cannot be charged.
• Once charging is completed, be sure to disconnect the USB cable from 

the charging port.

• Charging and lighting times are approximate values, and will vary by 

environmental and user conditions.

• Charging, discharging, and storing in high temperatures will cause the 

rechargeable battery to deteriorate faster. Do not place the light inside a 

vehicle or near a heater. Make sure to charge only when the ambient 

temperature is between 41˚F and 104˚F (5°C and 40°C).

• If the illumination time is significantly reduced even after proper charging, 

the rechargeable battery may be nearing the end of its service life.

Cautions on storage:

• If the device will not be used for a long period of time, store it in a 

location that is not too hot or too humid. 

• Charge the battery for about 30 minutes every 6 months.

Cautions for dispose:
When disposing the light unit, please do so in accordance with your 

local regulations.

CAUTION!:

•  Always charge the product before use.
•  Once charging is completed, securely close the charging port cover.
*1: When turning the light on, it lights up in the mode that was used the last time. 

(Mode memory function)

Remaining battery capacity:
If the switch (indicator) turns red, charge the product as soon as possible.

ENG

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WARNING!!!

 (Risk of death; Prevention of accidents)

• Do not look directly at the light source. In addition, when mounting the 

light unit, ensure that the light will not dazzle other road users.

• Before riding, make sure the light unit is securely attached to the handlebar 

and that the light turns on. Do not use a damaged rubber band.

• Always attention to the remaining battery power by checking the indicator 

periodically while using.  

• Do not disassemble or modify the light or any of the included items.

CAUTION!

 (Prevention of injury, damage, or property damage)

• Operating the light while riding is dangerous. Always ride safely.
• Note that the light becomes hot while illuminated. Do not block the lens or 

cover the light.

• Do not place it within children’ s reach.
• Carrying a spare headlight is recommended in case the battery runs out.
• When used with a cyclocomputer, attach the headlight as far away from 

the cyclocomputer as possible, as it may affect measurement.

• This device is rated IPX4 based on JIS C0920. Do not immerse the device 

in water. Doing so may cause a malfunction. Wipe off any moisture after 

using the device in rainy weather.

• Do not subject the light to strong vibrations, impacts, or excessive force. 

Discontinue use if any abnormality occurs.

• Do not charge the battery in any way or at any voltage other than that 

specified. Do not short-circuit the battery.

• Do not drop the light into a fire or heat the light.
• If the light unit or parts become dirty with mud, etc., clean with a soft cloth 

which is moistened with mild soap. Never apply paint thinner, benzine or 

alcohol; damage will result.

CHARGING / SWITCH OPERATION

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HOW TO MOUNT TO A BICYCLE

Light unit + Rubber band

USB cable

Before using the light, read this manual thoroughly and keep 
it for future reference. Do not use the light in any way other 
than as described in this manual.

Approx.

2.5 h

 (0.5A)

Standard charging time

USB cable

Charging port cover

To PC or USB 
battery charger

Charging

Charging is completed

Switch (Indicator)

Rubber band

Bracket spacer (hook)

*3

 

Adjusting the lighting angle

* A flashing light indicates a charging error. 

Remove the USB cable and try again.

Turn the light unit 90 degrees (perpendicular to rubber band), and attach the headlight to 
the handlebar.
Pull the rubber band tight and secure it to the hook on the bracket spacer so that the light 
unit is not loose.
Turn the light unit back toward the direction of travel.

*2: The light unit can be turned 360 degrees.
*3: When mounting the light unit, ensure that the light will not dazzle other road users.

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Included Items

Fold back

 Ø

22 – 35 mm

Switching the lighting mode

Low

Low

Flashing

Flashing

High

High

Double-click

Press and hold

Press and hold

Press and hold

Click

Click

OFF

ON

*1

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