Sofirn BLF LT1 - Safety Precautions; Integrated Charger; Quick Start

storm. See the UI Diagram and the following sections for more details of the features and
customizations.
Batteries:
Four button-top 18650 batteries. Max. length 70 mm. Batteries are not included (except kit
version)
Charging: Integrated DC/DC buck charger via USB-C
Driver: 5 x 7135 constant current integrated circuits. Low parasitic drain while LT1 is powered off.
Body: Aluminum with HA III anodizing
Switch: Electronic side switch
Ingress rating: Equivalent to IPX7
Weight: approx. 405g without batteries
Size: 68 mm Ø head x 176 mm length
Safety precautions
Use only reputable 18650 cells of known origin. Quality cells, button top type cells. The supported
maximum length is 70 mm, max diameter is 19mm.
Connect the coming USBC charging cable and recharge the lantern when the low voltage
indication is given by the Lamp (repeated step-downs in light level and eventual shutdown of the
light).
The extraordinary energy density that 18650 cells offers also means that hazardous conditions are
created when a cell is short-circuited or damaged. Always treat cells with respect and properly
dispose of damaged cells.
When running at higher output levels the head of the lantern will heat. This is normal. In warmer
ambient conditions this temperature may exceed 50ºC depending on your settings, so please take
the necessary precautions when handling the Lamp.
Battery Replacement:
Unscrew the body, and insert battery with the anode side(+) towards the light’s head/ LED, and
then screw the tail cap back on.
Integrated Charger
The LT1 lantern has a USB-C charging port. Please use a quality cable and USB power adapter with
5V / 2A-3A to charge your LT1. While charging the LT1’s switch glows BLUE. It changes to steady
BLUE when charging is finished. After you unplug the charging cable, the switch is steady ORANGE
which indicate enough power left. LT1 can charges your devices such cellphone via 5V / 2A-3A.
When the power left in LT1 is not enough, LT1 stops the output.
Quick Start
After putting a battery in the light and tightening the parts together, the light should quickly blink
once to confirm it has power and is now operational. After that, basic usage is simple:
Click to turn the light on or another click to turn it off.
- Hold the button to change brightness.
- Release and hold again to change brightness the other way.