Powered by a triangular rechargeable battery pack that consists of three 18650 3400 mAh lithium-ion cells, bundled together to for the ultimate power source with a 10200 mAh capacity in total, the i18R has a run-time of up to 5 hours on the highest setting (down to 1 lumen).
The battery pack is charged inside the torch via the charging port on the neck of the torch. Lift the dust cover to reveal the charging port and then plug in either the UK mains adaptor to charge via the wall or the USB cable to charge via a computer/laptop or via car with a suitable USB car adaptor (not included). The charging indicator in the switch will go red to show charging is in progress and turn green once charging is complete.
The i18R offers three brightness settings and strobe, which are available in three pre-set selectable modes. The torch is factory set to mode 1, which cycles through in the order of high, mid, low and off with each press. Mode 2 cycles through the settings in the opposite direction of low, mid, high and off. Finally mode 3 cycles through the brightness settings the same as mode 1, except when the torch is on in any mode, you can press and hold the button to activate the strobe setting.
Switching between modes is simple and is done by holding down the button while the torch is off. While holding the button the light will blink once to indicate mode 1 after 10 seconds, blink twice to indicate mode 2 after 13 seconds and blink three times to indicate mode 3 after 16 seconds. Once you have reached the setting you desire, release the button and the light will stay in this mode until you change it again.
The i18R also features a lock out mode to prevent accidental activation when not in use and can be activated the same way as changing modes, except you hold the button for 19 seconds until the light blinks four times. To come out of lock out mode, hold the button for 5 seconds until the light blinks once.
An integrated power indicator in the switch of the torch indicates remaining battery power by displaying a green, yellow or red light. This will automatically happen when you insert the batteries or you can access it any time by holding the button for 2 seconds while the torch is off.
The advanced focus system allows you to focus the light from spot to flood by sliding the head of the torch forwards and backwards. On the highest setting when focused into a spot, with a fully charged battery, the i18R can throw the beam up to 540 metres range.
A lanyard is included for extra security while holding the torch and can be threaded through the hole in the tail cap. Also included are two rubber anti roll rings, one for the head and one for the tail, to prevent the torch rolling on flat surfaces and to protect the head from scratches.