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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Description

🔦 Light up your life, not your pocket!

RUGGED RELIABLE - Aluminum alloy body with IPX8 waterproofing—built for any adventure.
RAPID RECHARGE READY - Full charge 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.
EVERYDAY CARRY ESSENTIAL - Keychain-sized convenience meets professional-grade illumination.
ULTRA COMPACT POWERHOUSE - Slim as your pinky, weighs just 13g—carry brilliance everywhere.

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 rated IPX8 waterproof, it offers dual brightness modes controlled by a simple twist. Weighing only 13g and charging fully in 75 minutes via Micro-USB, it’s the perfect compact companion for camping, hiking, dog walking, or everyday carry.

Specifications

Special Feature	Rechargeable
Colour	Black
Power Source	Battery Powered
Light Source Type	LED
Material	Aluminium
White Brightness	150 Lumens
Included Components	Battery
Product Dimensions	44D x 15W x 15H Millimeters
Voltage	3.7 Volts (DC)
Battery Cell Composition	Lithium Ion
Item Weight	13 g
Number of Batteries	1 Lithium Ion batteries required. (included)
Water Resistance Level	Waterproof
Brand	Olight
Brightness	150 Lumen
Battery Description	Lithium-Ion
Style	With Micro USB Cable
Finish Type	Black
Specification Met	IPX8
Mounting Type	Handheld (with Key Ring)
Recommended Uses For Product	Camping, Hiking, Dog Walking, Everyday Carry
Manufacturer	Olight
Country of Origin	USA
Item model number	AM-OL-I1R 2+USB
ASIN	B0814MDZKP

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