Can you lose the end cap? Will the key ring end unscrew completely from the body? (My problem with keyring flashlights that unscrew to turn off)

No. You unscrew till it slides open just enough to reveal charging port. When not charging the two will be screwed together by several threads, which are dust sealed by an o-ring. The o-ring also keeps it from coming unthreaded. I carry mine in my front pocket and have never had it come apart or accidentally get turned on.

So at max output it only last 5 min?

After 8 months of owning this light- I finally used it. It last about 10 min on high then lasted another 5- 10 min on low. Pretty good I think after having it charged 8 months ago. I will buy more for my family’s keychains.

Does this flat head micro usb cable fit into a normal usb wall charger adapter? I've never seen a usb charger with a flat charger end?

I've been using a previous version of this light , 130 lumens for more than a year. It is my EDC that I have on my keychain. I use the provided USB cable to charge from my office computer. Perhaps the photo is deceiving, as the USB head is the same as every other USB cable I have seen, and the small end fits into the light. I would not expect any different result when using a USB charger adapter. When Olight put these 150 lumen lights on sale, I bought a dozen to give to family and friends. For the size, they are a must. Put it on your keychain. Hook it on your dog's collar during night time walks. It is bright enough to be a handy aid, always at your fingertips.

Is the battery replaceable? If so what battery? Could you use a regular battery in an emergency?

Sorry, it can not replace the battery. The battery is 70mAh 3.7V Li-ion Battery (built-in). Thank you!

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🔦 Tiny light, huge impact—never be left in the dark again!

RUGGED RELIABLE - Aluminum alloy body with IPX8 waterproof rating—built for any adventure.
RAPID RECHARGE READY - Full battery in 75 minutes via Micro-USB—no disassembly needed.
DUAL BRIGHTNESS MODES - Twist to switch from subtle 5 lumens to a blazing 150 lumens spotlight.
POCKET SIZED POWERHOUSE - Slim as your pinky, weighs just 13g—carry brilliance everywhere.
SEAMLESS EVERYDAY CARRY - Integrated keyring design keeps your light handy for camping, hiking, or late-night dog walks.

The OLIGHT i1R 2 EOS is a sleek, rechargeable keychain flashlight delivering up to 150 lumens from a cutting-edge 5-sided CSP LED. Crafted from durable aluminum alloy and IPX8 waterproof rated, it charges fully in just 75 minutes via Micro-USB without disassembly. Ultra-lightweight at 13g and compact enough to fit on your keyring, it offers dual brightness modes for versatile everyday use—perfect for professionals on the go who demand reliable illumination anytime, anywhere.

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TrustScore 4.5 | 7,300+ reviews

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Product Dimensions	3.68 x 1.78 x 11.28 cm; 13 g
Item Weight	13 g
Finish types	Black
Specification met	IPX8
Batteries required	Yes
Battery type	Li-ion
Included components	Flashlight i1R 2 EOS (with Key Ring) x 1, Micro USB x 1, User Manual × 1

OLIGHT i1R 2 EOS 150 Lumens Tiny Rechargeable Keychain Flashlight EDC Mini LED Keyring Light with Built-in Battery for Camping Hiking Dog Walking etc (Black)

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