Power Indicator
The LED indicator in the side switch shows the battery’s power status for 5s after turning the light on.
Constant Blue = remaining battery power is good.
Constant Red = remaining battery power is poor.
Flashing Red = critical power, replace or recharge battery as soon as possible.
Low Voltage Protection: If the battery’s voltage is lower than 3.0V the LED indicator will flash red. If it gets below 2.6V, the CenTac ML-32 turns off automatically to avoid battery damage by over-discharge.

Battery Installation
Unscrew the tail cap to insert one 26650 or one 21700 (with adapter sleeve) or one 18650 battery (with adapter sleeve) with the cathode side (+) towards the head, then screw the tail cap back on.

*Advice* Using protected batteries may result in less performance or triggering of the battery’s protection circuit. Please use unprotected batteries for maximum output. 

Recharging
The CenTac ML-32 has a USB-C port for convenient recharging of its battery. Please connect it with a quality USB-C cable and use a USB power adapter with 5V 2A. The usual charging current is 1.5A. It takes about 4.5 hours to fully charge a 26650 5.000mAh battery. While charging the LED power indicator flashes red. Once finished the indicator will turn blue to indicate a full battery. If the flashlight is being recharged in lockout mode, the lockout mode will be deactivated. During that time the CenTac ML-32 can be used for emergencies but it will prolong the charging process.

Operation Instructions
Group 1: Pre-set Stepped modes
Pre-set Stepped modes give you fixed brightness levels to choose from: Moonlight – Low – Medium – High
[with mode memory] and Turbo [no mode memory].
From OFF single click to turn ON. Press and hold to cycle through stepped modes (Low – Medium – High). Single click to turn OFF.
From OFF press and hold (0.5s) to activate Moonlight, press and hold again for Low mode. Single click to turn OFF.
Double click to activate Turbo mode (except when in lockout status). While in Turbo mode, single click to return to the previously used mode.
Group 2: Ramping mode
Ramp mode gives you full flexibility to adjust brightness steplessly from Moonlight to Turbo level.
[mode memory active for ramping but not if Turbo is activated by double click]
From OFF single click to turn ON. Press and hold to change brightness steplessly (“ramp”). Ramping changes its direction when the button is being pressed again within 1.5 seconds. The light flashes once when it reaches the lower or upper end of the ramp. From ON single click to turn OFF again. All other functionalities are the same as in stepped modes.
Toggle between Group 1 and Group 2
From ON quadruple click to switch between both mode groups.

Strobe Mode [no mode memory]
Triple click to activate Strobe mode (except when in lockout status). While in Strobe mode, single click to return to the previously used standard mode.

Electronic Lockout
CenTac ML-32 comes with a lockout function to prevent accidental activation, e.g. in one’s pocket or backpack.
From OFF quadruple click to active lockout. While in lockout, hold to activate momentary low mode (10lm) for emergency use. Another quadruple click to deactivate lockout again and return to the previous mode setting. When the light is locked, the main LEDs only blink two times to show the status of being locked.

Advanced Temperature Regulation (ATR) technology
The light will accumulate a lot of heat when used at high brightness modes for extended periods. As the temperature rises, CenTac ML-32 is programmed to automatically step down and step up the brightness. These thresholds are set at 45°C, 55°C and 65°C. The higher the temperature gets, the more the brightness will drop. Once temperature decreases, brightness will be increased again according to your selected mode.