40mm 25amps constant current buck driver for 3X21D,PD18W reverse output

40mm diameter, special driver for 3X21D flashlight

max 25amps constant current, 

reverse output PD 18W,

In case of emergency, you can charge your mobile phone.

Mode operation instructions:

click the button  ——>  flashlight is turned on with last brightness ——> press the button,brightness ramping up ——> release and press the button again,brightness ramping down

flashlight on or off, 2-click the button  ——>  turbo 100%

flashlight off,3-click the button   ——>  strobe

flashlight off,4-click the button   ——>  tactical mode, only 100% ,4-click the button again to quit tactical mode.

flashlight off,5-click the button   ——>  voltage detection  (* means "flash" ,  *** pause ******* means 3.7V, )

flashlight off,6-click the button   ——>   ramping mode switch to   4modes 1%-10%-40%-100% 8.flashlight off,10-click the button   ——>  Lock mode,The flashlight will flash once under any operation, which means the flashlight is locked.10-click the button again to quit lock mode,Please note that this is the only way to unlock.

The flashlight has low voltage protection and temperature control protection.