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CHARGING

LIGHT OPERATION & BATTERY LIFE

USER GUIDE

ZENITH • DIABLO SYNC • DIABLO • AXIS • JOYSTICK • SIRIUS

Fully Charge your light 

before

 first use. 

 

Locate the charging port by pulling away the silicone Storm Cap.

Fully insert either the Smart Charger or USB top up cable and begin charging from a mains or USB 

supply respectively.
If you are using the Smart Charger the LED on the charger will go red for the first 95% and then go 

green for the trickle charge.
On the back of the light there is a single LED which will flash green to indicate that it is charging 

and then turn solid green when the light is 95% charged, then the remaining 5% is trickle charged. 

NOTE:

 

Sirius

 will require the 

1.5A Smart Charger

 (EXPCHARGERSALES) from  

www.exposurelights.com, to initiate trickle charge.

Located on the back of the light is the stainless steel Function Button and a single LED. The LED 

indicates both mode and battery life remaining.
To turn the light on press the function button twice in quick succession, the light will then turn on in 

the brightest mode.
To switch between high, medium and low modes press the function button once, repeat this 

process to cycle through the modes.
The LED on the back of the light will 

initially

 indicate the mode the light is in:

 

Green – High.
Amber – Medium.
Red – Low.

After three seconds the LED on the back of the light  

will indicate battery life remaining. See Fuel Gauge table (right). 

To turn the light off hold the function button down until the light emits two flashes and then release.

NOTE:

 If you are using an Exposure Support Cell with the light then the LED will pulse green to 

indicate the light is charging.

For more information please visit:

For more information please visit:

exposurelights.com

exposurelights.com

EXPUG4.5

EXPUG4.5

WARRANTY & SERVICE

DAYBRIGHT (SIRIUS ONLY)

MAINTENANCE

LOW VOLTAGE FLASH (ZENITH, DIABLO, AXIS & JOYSTICK)

WARNING

FLASH MODE

Inspect and test your light and bracket apparatus before every ride.
Keep your light clean and free of dirt, be careful when cleaning any mud or dirt from the lens to 

avoid scratching. 

Never use a high pressure spray or hose on your light. 

Do not use harsh abrasive or corrosive materials to clean your light. 

For extended periods when your light is not in use fully recharge the light once a month, as a long 

duration with no charge is detrimental to the cells.

To warn the user when the light has 10% or less of battery life left the light will flash. It is then 

advisable, if it is safe to do so, to put the light in a lower setting to prolong battery life. See the OMS 

section for more detail.

NOTE:

 The light will continue to give off these warning flashes, regardless of setting, until its 

battery is charged back above 10%.

Please do not send any products back to us without contacting our service team first to 

discuss your issue and for a valid returns number.

All our lights come with a 2 year warranty. Lifetime warranty on emitters for the original owner.
If you have a servicing or technical question you can contact us using the information below. If you 

return your light for repair no work will be carried out until you have been contacted with the cost 

for the repair. If you are outside of the UK it would be quicker in the first instance to contact the 

local distributor. 

 

+44 (0)1798 839300 

 

[email protected]

We recommend using your Sirius in DayBright mode during daylight hours for your safety.  

To activate DayBright your Sirius will need to be in Program 1 (see OMS section) and then activate 

Flash Mode (see above).

Exposure Lights are very powerful lighting systems, please take care when operating. Do not 

look directly into the light or shine directly at others, including other road users.
Do not charge the light in an enclosed place, or with the lens in contact with potentially 

combustible material. 
Exposure Lights / Ultimate Sports Engineering Ltd. accept no liability for any injuries or other 

damages arising from the use of their product in any circumstances.

NOTE:

 Patents apply.

To activate the Flash Mode first the light needs to be ON. Hold the Function button down and 

immediately release after the light emits a flash. The Flash mode can be activated from any of the 

constant brightness settings.
To return to the constant mode press the Function Button once. NB: The light will then return to the 

brightest setting.
In Program 7 the Flash Mode is replaced with the Morse Code for SOS. For more information about 

changing programs see the OMS section of this guide.

LED

BATTERY %

GREEN  

100 – 85%

GREEN PULSE

85 – 70%  

AMBER

70 – 55%

AMBER PULSE

55 – 40%

RED

40 – 25%

RED PULSE

25 – 10%

RED FLASH

10% – Empty 

IMPORTANT:

• 

After charging is complete, remove the charging cable from the light (if the light is left 
connected with the charger off, the light can switch on)

• 

Replace the Storm Cap to prevent ingress of mud and grit

• 

Do not charge the light with the lens face down or in contact with any potentially 
combustible surface

• 

Do not charge the light in an enclosed space

APPROX MAINS CHARGER TIMES

ZENITH

5 HRS

DIABLO

4 HRS

AXIS

4 HRS

JOYSTICK

4 HRS

SIRIUS

*7 HRS

*7 hours from 500mA source  

with supplied USB cable.

CHARGE PORT

/SMART PORT

#ownthenight

Ultimate Sports Engineering Ltd 

Unit 4 Bury Mill Farm 

Bury 

West Sussex 

RH20 1NN 

United Kingdom

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