*BLF LT1 Lantern Project) (updated Nov,17,2020)

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gramophoning
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Joined this forum to post this question; hopefully someone can advise!

I recently purchased a BLF LT1.

While it worked out of the box, it no longer seems to work since I’ve attempted charging. When it’s plugged into my computer the indicator light looks like a mixture of green and red. It can be turned on, but then it almost never works after it is unplugged.

I suspect it isn’t really charging? Maybe the problem is USB – I’ve tried using two different Apple computers, neither of which run USB-C, but I assumed that things were backwards compatible. If that’s the problem, what’s the easiest way to charge a BLF LT1 on a USB3.0 machine?

Thank you so much!

DudeMan
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welcome to the forums gramophoning. did you get the version that came with batteries?
they have stickers on them for transport you need to remove to use the light.

also for charging, why not a wall wart? this light can take over an Amp of current.

gramophoning
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Yes, I got the version with batteries – what do the stickers look like? Are they white and (haha) very hard to remove? If so, that’s the problem!! Trying to peel them now.

DudeMan
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they are on the negative side of the battery. don’t know the color. NOT the insulating rings on the +positive side.

sbslider
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gramophoning wrote:
Yes, I got the version with batteries – what do the stickers look like? Are they white and (haha) very hard to remove? If so, that’s the problem!! Trying to peel them now.

Hmm, if the lantern worked before charging, then at least one of the cells must have been making contact. So charging shouldn’t affect that. But if it works again after removing the stickers, then all is well.

Welcome to BLF! Beer

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gramophoning
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There are white circle stickers on the negative side – the same colour/texture as the insulating rings…

gramophoning
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ok, managing to peel them off… thank you! a dumb mistake.

DudeMan
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not dumb at all. you are welcome. Davie Beer

gramophoning
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Hmm…. I peeled off the four negative stickers but the charger light is still showing a combination of green and red.

Are you sure I shouldn’t remove the ring stickers on the positive ends?

DudeMan
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if you unplug it and hit the power button does it power up?

TimMc
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Remove these stickers:


Don’t remove the white circle from near the pointy/button at the top. That’s an insulation circle.

gramophoning
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OK, yes, I’ve removed the negative stickers but will leave on the positive.

No, the light doesn’t turn on when unplugged from the computer. Sad

niajef
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what kinda cable are you using? it would help if you show us pictures of the cable, the batteries, etc. and also how the light looks like when charging

TimMc
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Is the tube screwed in securely? It won’t turn on if you loosen it slightly. The tube won’t be touching the PCB to complete the circuit.

Try wiping the silver aluminium part of the tube and the part that it touches on the head with a dry cloth.

gramophoning
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I’m going to take photos later… But one thing is that the tube doesn’t SEEM to ever get tight – it just turns and turns, which I thought was by design?

niajef
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gramophoning wrote:
I’m going to take photos later… But one thing is that the tube doesn’t SEEM to ever get tight – it just turns and turns, which I thought was by design?

i dont have the LT1 yet, but that sounds like the treads are stripped, maybe thats why its not turning on, because it doesnt get tight, it doesnt push for proper contact

Perception
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niajef wrote:
gramophoning wrote:
I’m going to take photos later… But one thing is that the tube doesn’t SEEM to ever get tight – it just turns and turns, which I thought was by design?

i dont have the LT1 yet, but that sounds like the treads are stripped, maybe thats why its not turning on, because it doesnt get tight, it doesnt push for proper contact

I can confirm that the battery tube screws very firmly to the head of the lantern. It does not spin.

niajef
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Perception wrote:
niajef wrote:
gramophoning wrote:
I’m going to take photos later… But one thing is that the tube doesn’t SEEM to ever get tight – it just turns and turns, which I thought was by design?

i dont have the LT1 yet, but that sounds like the treads are stripped, maybe thats why its not turning on, because it doesnt get tight, it doesnt push for proper contact

I can confirm that the battery tube screws very firmly to the head of the lantern. It does not spin.

ya thats what i thought, it doesnt make sense to just keep on spinning, i dont know any flashlight designed like that

hinbli
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The battery tube of my LT1 screws on tightly, too. When yours keeps turning and turning, where is the area which keeps turning? For example, are you holding the very top of the light (the black anodized aluminum head with the hook for hanging) and the battery tube? If the head is turning freely, does that mean the connections to the LED’s are broken?

I am not exactly certain about the construction of this light. But, I am wondering.

TimMc
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Here’s an example:

View post on imgur.com
Rexlion
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It needs to be screwed down until it stops, or it’s physically locked out from working. Good video, TimMc! Thumbs Up I think that’s the problem. If you get it screwed together fully (those threads are quite long btw) and it still won’t light up, I would try charging the cells in a separate charger; if that made it work, I’d conclude that the on board charging was inoperative, and contact Sofirn for replacement.

== We save the planet from darkness ==

SIGShooter
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Faster to test the batteries with a DMM if you have one before charging them in another charger. “gramophoning said…While it worked out of the box, it no longer seems to work since I’ve attempted charging” implies that the insulating rings weren’t a problem since it lit up at one time. Perhaps it’s locked out? Does holding the switch down make it light up dimly?

DBSAR
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I move into my new house this Thursday coming! once i get settled in, i will take some new photos of the LT1s in use, and get back into the LT1-Mini design. Thumbs Up

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

SIGShooter
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DBSAR wrote:
I move into my new house this Thursday coming! once i get settled in, i will take some new photos of the LT1s in use, and get back into the LT1-Mini design. Thumbs Up
Happy to hear that things are settling down for you. I know it’s been a stressful year for you.
hank
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Um, Firefox claims there are 376 pages in this thread. I got on a list a couple of years ago but haven’t kept up.
Is there an expectation of this lantern being available, do I need to sign up again?
Sorry to ask a TL/dr question; life’s been a bit confusing lately.

niajef
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hank wrote:
Um, Firefox claims there are 376 pages in this thread. I got on a list a couple of years ago but haven’t kept up. Is there an expectation of this lantern being available, do I need to sign up again? Sorry to ask a TL/dr question; life’s been a bit confusing lately.

its been available already

SammysHP
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hank wrote:
Um, Firefox claims there are 376 pages in this thread. I got on a list a couple of years ago but haven’t kept up.
Is there an expectation of this lantern being available, do I need to sign up again?
Sorry to ask a TL/dr question; life’s been a bit confusing lately.

It’s available over a years already. Wink
Serlite
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hank wrote:
Um, Firefox claims there are 376 pages in this thread. I got on a list a couple of years ago but haven’t kept up. Is there an expectation of this lantern being available, do I need to sign up again? Sorry to ask a TL/dr question; life’s been a bit confusing lately.

Yep, it’s available right now!

Sofirn’s store / AliExpress Amazon

If it’s not super urgent, you could wait and see if a sale/coupon shows up for your vendor of choice.
But the base price is pretty reasonable too (and in line with the initial GB price of $50).

niajef
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ya i got it on AE with batteries for 49 USD

angerdan
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DBSAR wrote:
I move into my new house this Thursday coming!
once i get settled in, i will take some new photos of the LT1s in use, and get back into the LT1-Mini design. Thumbs Up

Congrats Thumbs Up
I guess many are interested in the colours for the LT1, do you have any informations about it?
https://budgetlightforum.com/node/69644

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