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FEATURES

Focusing LED headlamp.

Zoom-able head for spot and flood beam.

Cool or neutral white LED version available.

IPX4 Water resistant.

1000 lumens for 16 hours.

8 Selectable brightness levels from 10% to 80%.

4 selectable blinking modes: police blinking, slow blinking, quick 

blinking, and SOS.

Smart IC motherboard provides multiple brightness settings, 

and prevents overheat, over discharge or damages caused by polar 
reversing.

Battery level indicating at 20% capacity.

10 

Elastic bungee headband capable of length adjustment, providing 

best fit and comfort for user.

11 

Optional Diffuser and USB cable charger available.

12 

Optional BP2836B, BP4836B and BP6836B for longest runtime each 

8.6 hours, 17.2 hours and 25.8 hours on High.

GENERAL USAGE

Briefly press the rubber switch to turn the HL40AAII on/off.

The HL40AAII provides three lighting options:

 

Maximum brightness:

 100% output.

 

Custom brightness:

 eight selectable modes ranging from 10% to 

80% output. 

 

Strobe / SOS:

 police strobe, slow strobe, rapid strobe and SOS.

Operating Instruction

 

To turn the HL40AAII on, briefly press the rubber switch. The default 
setting is maximum brightness (100% output).

 

To access custom brightness mode:

 with the HL40AAII turned on 

(in either max or custom mode), hold the switch down for more than 
2 seconds and the HL40AAII will cycle through 8 levels of output. 
When a desired output is displayed simply release the button to set 
the brightness.

 

The HL40AAII has 3 hidden strobe modes and 1 SOS mode. To access 
these modes simply hold down the power button for 2 seconds with 
the unit turned off and release. 

To cycle to the next strobe / SOS 

mode once again hold for 2 seconds and release. To exit strobe / 
SOS mode simply press the switch once (turns the HL40AAII off). 
The brightness level of strobe / SOS mode is determined by the 
brightness set in custom mode.

50% battery warning:

 When battery capacity reaches 50%, the 

HL40AAII will blink twice quickly to indicate battery status.

Low battery warning:

 When the battery capacity gets very low 

(approx. 20%), the HL40AAII will emit 10 successive blinks in 8 seconds. 
This is a reminder that the battery should be recharged or replaced.

Reverse polarity protection:

 When a battery is inserted incorrectly, 

a special protection circuit will activate and automatically prevent 
operation to ensure the safety of the HL40AAII and its user.

The HL40AAII is also designed with intelligent over-discharge 

detection. If battery voltage reaches a critical lower limit, the HL40AAII 
will automatically turn off, at which time the battery should be 
recharged as soon as possible. Over-discharge of 18650 cells can cause 
irreversible damage to the battery and in extreme cases, cause the 
battery to inflate and / or emit a harmful gas. It is for this reason that 
the HL40AAII is designed to operate only with 18650 batteries that are 
above the lowest acceptable voltage limit.

STRETCH THE ROTATION HEAD PART TO ADJUST THE BEAM SIZE AND FOCUS SPOT

DIAGRAM

INSTALL AND REMOVE THE BATTERY BOX

AA BATTERY BOX INSTRUCTIONS

USER MANUAL

Focusing  

LED Headlamp

HL

40

AA

II

 

UNSCREW THE NUT

BOTH NUTS ARE UNSCREW

REMOVE THE SCREW CASE FROM 

BATTERY BOX

INSET 3PCS 1.5V AA BATTERY 

WITH THE CORRECT POLAR IN AA 

BATTERY BOX

PUT THE SCREW CASE IN THE RIGHT 

DIRECTION

SCREW UP BOTH NUTS ON AA BOX

TWO RUBBER BELTS TO TIGHTEN 

ON AA BOX

CONNECT THE 5.5DC PLUG OF HEADLAMP AND THE 5.5 DC JACK 

OF AA BOX, AND THEN SCREW UP THE HOLDER

THE DIRECTION OF DC JACK FOR 

AA BATTERY BOX SHOULD BE TO 

SWITCH BOX OF HEADLAMP

PUT THE AA BOX THRU THE RUBBER 

BELT

ADJUSTMENT BUCKLE

NYLON ELASTIC BAND

HEAD

LED

ADJUSTMENT 

DIRECTION

SWITCH

5.5 DC PLUG CABLE

BATTERY BOX 3*AA

PHOTOS ARE FOR REFERENCE ONLY, PRODUCTS IN KIND PREVAIL!

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