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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Sold byAmazon UKDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔑 Light up your life with the tiniest titan of illumination!

TWIST SHINE CONTROL - Intuitive twist head operation toggles between soft 5 lumens and full 150 lumens instantly.
POCKET SIZED POWERHOUSE - Slim as your pinky, packs a punch with 150 lumens bright LED beam.
EVERYDAY CARRY ESSENTIAL - Weighs only 0.46oz, fits seamlessly on your keyring for on-demand illumination anywhere.
BUILT TO BRAVE THE ELEMENTS - Durable aluminum body with waterproof rating and backed by a 5-year warranty.
RAPID RECHARGE ZERO DOWNTIME - Fully juiced in just 75 minutes via convenient Micro-USB—no disassembly needed.

The OLIGHT i1R 2 EOS is a sleek, ultra-lightweight rechargeable keychain flashlight delivering up to 150 lumens of adjustable LED brightness. Designed for fast 75-minute USB charging and effortless twist-to-operate control, it’s perfect for professionals on the go who demand reliable, compact lighting for camping, hiking, or everyday tasks. Built with durable aluminum and waterproof features, it offers a 5-year warranty, making it a smart, stylish EDC upgrade.

Specifications

ASIN	B0814MDZKP
Additional Features	Adjustable Light Modes, High Power, Lightweight, Portable, Rechargeable
Batteries are Included	Yes
Battery Description	Customized Rechargeable Battery
Battery Type	Lithium Ion
Best Sellers Rank	#75,103 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #779 in Handheld Flashlights
Brand Name	OLIGHT
Color	Black
Customer Reviews	4.8 4.8 out of 5 stars (5,836)
Finish Types	Black
Included Components	Flashlight i1R 2 EOS (with Key Ring) x 1, Micro USB x 1, User Manual × 1
Item Dimensions D x W x H	1.73"D x 0.58"W x 0.58"H
Item Dimensions L x W x H	1.45"L x 0.7"W x 4.44"H
Item Type Name	Flashlights
Item Weight	0.03 Pounds
Light Output Maximum	150 Lumens
Light Path Distance	40 Meters
Light Source Special Features	Adjustable Light Modes, High Power
Light Source Type	LED
Manufacturer	OLIGHT
Manufacturer Part Number	AM-OL-I1R 2+USB
Manufacturer Warranty Description	5 years warranty.
Material Type	Aluminum
Model Number	AM-OL-I1R 2+USB
Mounting Type	Handheld (with Key Ring)
Number of Batteries	1 Lithium Ion batteries required. (included)
Number of Light Sources	1
Power Source	Battery Powered
Runtime	6 hours
Set Name	Kit
Shape	Compact
Style Name	Keychain
Unit Count	1 Count
Water Resistance Level	Waterproof
White Brightness	150 Lumens

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