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300 Lumens Small EDC Flashlight - I5T EOS

300 Lumens Small EDC Flashlight - I5T EOS

The Olight I5T EOS powered by a single AA battery with an amazing max output of 300 lumens, which is very powerful for its size. It features a double helix body knurling for an attractive appearance, unique style, excellent ventilation, and solid grip. I5T small EDC flashlight is equipped with a high-performance LED paired with a PMMA optic lens producing a soft and balanced beam for comfortable use. It also features a dual direction pocket clip for multiple carrying options such as a pocket, backpack strap, or hat brim as a headlamp in seconds for a hands-free experience, making the flashlight incredibly convenient to take with you everywhere.


The Olight i5T Flashlight uses a single AA battery with a maximum output of up to 300 lumens. It is a small EDC flashlight with two levels of brightness and a rear button. Here are four features of the i5T.

Powerful for its size: Compact and lightweight, powered by a convenient and widely available single AA battery, it delivers a max output of 300 lumens and a max throw of 60 meters. And it has a unique style - double helix body knurling is designed for unique style, excellent ventilation, and solid grip.

Highly integrated tail switch: The user can operate momentary on and quick mode shifting (15/300 lumens) all through a convenient tail switch. A built-in spring inside. Silicon small pearls outside. All for an anti-slip smooth pressing experience.

Smooth and Easy Operation: The tail switch features a built-in spring, making the pressure smooth and just right; Embedded with a small pearl silicone surface, the switch provides an anti-slip pressing experience.

Versatile Carry Options: The dual direction pocket clip makes it convenient to carry the flashlight in a pocket or attach it to a hat brim or backpack strap for a hands-free experience. With a lanyard hole, the clip can accept a 1.5mm diameter lanyard cord.

EDC flashlight, small flashlight

Light output mode

Olight I5T has only 2 output modes:


l Low – Output Mode: Brightness up to 15 lumens, Runtime: 5% (20 hours)

l High – Output Mode: Brightness up to 300 lumens, Runtime: 100% (3 minutes) -> 50% (25 minutes) -> 10% (122 minutes)


It has a tail button switch, which can complete 3 operations of tactical lighting, constant lighting, and quick shifting of gears (15/300 lumens). Lightly press (half-press, don't press down completely) the rear button switch, and the flashlight will turn on the momentary mode (releasing it will turn off), and the default low gear.

Press lightly again, and it will switch to high light mode. If you keep half-press, the flashlight will keep switching between high and low gear. You can switch gears back and forth freely within 2 seconds of the last button, that is to say after you turn on the flashlight, you have 2 seconds to select the high mode. After 2 seconds, the light will return to the low gear again.

To be honest, take the time to study it, SIMPLE BUT SPECIAL. Fully pressing the tail switch will turn on constant mode, which defaults to low gear. To switch to high gear, first fully depress the tail switch to turn off the flashlight. Then half-press the tail switch, then press it again, switch to high gear, and press the switch fully. It should be noted that once a mode is selected and the switch is fully pressed, the flashlight must be switched off before switching gears.

Olight i5T operation, flashlight tail cap

Technical Details

Size and Weight

1. Head Diameter: 17.8mm

2. Body Diameter: 17.8mm

3. Body Diameter with clip: 25.09 mm

4. Overall length: 95.44mm

5. Total weight with battery: 60g


1. Beam Distance:196 ft (60 m)

2. Max Performance:300 lumens

3. Max Light Intensity:910 candela

4. Waterproof: IPX8 Drop Test: 1.5m

5. Light Source: High-Performance Cool White LED

6. Mode Operation: Tail Switch

i5T small EDC flashlight performance

Battery Compatibility

Compatible Batteries:1.5V AA Alkaline Battery (Included) AA NiMH Battery (Compatible) Many people may be curious, is this flashlight compatible with other batteries?

The Olight i5T small EDC flashlight comes with a GMCELL AA alkaline battery. When Olight released the product, someone asked whether the i5T supports a 3.6V 14500 lithium-ion battery? Olight confirmed with the engineer on the spot: it can indeed support 14500 lithium-ion batteries, but the output effect is not so good. The supported battery effect is similar to 1.5v AA alkaline batteries and AA NiMH rechargeable batteries.

According to the actual test of some O-fans, after changing the 14500 lithium-ion battery, it is brighter, and the lumens are about 600. It is not impossible to use 14500 lithium-ion, but Olight does not recommend this use!

Mainly for the following 3 reasons:

1. It’s not good for the life of the battery and the flashlight itself.

2. When using a 14500 battery, there is only one gear.

3. Heat is an issue. The flashlight can get very hot when using a 14500 battery.

In addition, Olight also emphasized that if the power of the flashlight's own battery drops below 1.2V, it cannot switch to the 300-lumen high-brightness gear, which means that it cannot be switched to the high-brightness mode in the low-power mode.

Actual lighting effect test

The LEDs in the i5T are Osram P9 cool white LEDs, combined with the TIR lens made of PMMA material, the output light is soft and uniform, the vision is more comfortable, and it can illuminate a small area well.

Indoor fixed exposure (1/125s ISO 50)

 LED flashlight, light source

Outdoor fixed exposure (1/15s ISO 2000)

LED flashlight, EDC flashlight


Compared to other Olight products or other products of its competitors, 300 lumens is a bit low, but the output of AA batteries is quite high and it runs great.

The simple and easy-to-use rear button switch, I also like the appearance of the spiral design, it is very perfect and textured, and it is very good to hold in the hand. i5T small EDC flashlight is very good for people who do not have very high requirements for brightness. It is very good for daily use. It does not take up space in the pocket. They do not need a special charger and can directly replace the AA battery. That's it, very convenient.

In addition, this flashlight also has many limited-edition colors. If you like it, you can go to to check it. It has a 5-year warranty and 30 days for no reason return. And we also have another small flashlight for EDC use. Just rest assured to buy! Thank you for your reading.

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