Repeatedly opening the head that way will eventually break the top O ring (in my case after only a few times). I cant imagine this light is worth going through the trouble. Depending on how smart the charger is maybe you could hook it to something to measure the draw from the USB and guess? Have you measured if it even gets to 4.2V to begin with?
Yeah, it’s a free light. I wouldn’t go through too much trouble just to make the battery live a little bit longer.
Want.
Where to get this LED? Clemence still can’t offer economy shipping to my country :weary: .
I'd like to, but how to measure this without accessing the battery poles?
The threads (-) and the brass pillar (+), i’m charging mine fully now I will let you know where it ends up
Which can only be accessed by removing the head, correct?
I can manage the head to go very slightly sideways, but it doesn't come off and I dont dare pulling too hard.
I wouldn’t do this mod again personally. Press fit Olights deserve their cool white fate. I did it more as a challenge with zero concern if I ruin the light and lets be honest I did ruin it but managed to fix it enough to work again. It is cool to see that this optic will more or less focus a CSP type small led though, maybe there is hope for other lights.
Right, if you aren’t willing to yank it apart while it’s slightly sideways and risk ruining the O ring and having the spring fly out then I think you should just be content with not caring about the battery charge state.
You mean like monitoring the current being supplied to the light and stop charging as soon as that current starts dropping since that’s when it goes into CV phase?
Yes, assuming it works like that
Sure, it’s low CRI cold white. If have not a single “friend” I’d give it to. But it’s nice to look at. It’s mint. And it’s small, so it uses only little space.
Nah, it’s ok. I’m grateful for Olights gifts :+1:
It does. It normally pulls about 0.076A, and then starts dropping towards the end of charging cycle.
That would likely be a decent way to at least guess the top end voltage. For the bottom, a lux meter? Lol.
FYI, fresh off the charger it measures 4.16-4.17
I will be sending my friend Unheard a Christmas card this year so I can get the gifts of high cri neutral white lights and those artisan German forceps.
Luxeon HL1 might also fit as a more throwy alternative and it comes in 90 CRI: https://www.lumileds.com/products/high-power-leds/luxeon-csp-hl1/
s/gun/forceps
I was charging mine but fell asleep, when I got up the indicator light was still red 7 hours later or more, it seems to have charged though, anyone have this issue?
Yes. I had a 3 hour charging session where the light remained red. It seemed charged. The next time I charged it after a little use, the light turned green after about an hour. Unsettling.
I just received mine as the free gift. Charged it right away and after 10min the red light was off. No green light at all, but it seemed charged. Then I turned on HIGH for about 10min and then charged again, red light was off about 30-40min later and still no green light at all. But it seems all good. Weird.
I took out my USB meter and found that the charging current is about 0.08A only. So it’s about 1C charging given this light comes with only 70mAh battery. Make sense to me.
According to this Olight i1R 2 EOS Review – The Flashlight Guy it looks like when approaching end (guess it’s the CV phase) it only draws 30mA. Some power bank may turn off due to this low current. Maybe that’s what happened to me earlier because I’m actually using a powerbank to charge this light. I’ve attached the light to a USB hub which is constantly powered on. Let’s see if the green light comes on 
Edit: when approaching the end of charging it actually showed 0.00A on my USB meter, and then after about 10-15min in this 0.00A stage the green light turned on!
OT:
Congrats on your USB meter. Mine shows zero when charging the i1R2 all the time, even when charging a Nitecore Tube. Consequently it sums up to zero Ah. Guess the price makes a difference (bought the cheapest meter I could find).
I was charging it with an iphone charger in a standard 120v outlet, it stayed red the whole time at least 7 hours, but I did charge it off a PC usb port prior to this and it did turn green at a normal time. It is weird, maybe a firmware glitch? I will try next time with a usb meter and see if that tells me anything.