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

Ok thanks. Wasn’t sure if the lantern reported that info also or just voltage.

Was thinking if there was a bad cell that wasn’t working, since the lantern will work with any number of batteries. I guess if the battery holds a charge then that means it is good.

I accidentally fixed my orange O-ring so it fits my LT1 perfectly. It fell off and I put it in my back pocket on my pants. I forgot it was there and it went through the washer and dryer. When I found it again, it had shrunk and now fits the slot perfectly!

That is what happens when battery cells are inserted with alternating polarity — two springs end up melted. It’s likely that that happened at some point.

Best guess scenario…least chance for validation. requires responsibility.

+1. The springs have the usual discoloration and shape change caused by high heat concentrated around the battery contact area. I’m not blaming the user as perhaps it wasn’t your fault, but I believe these springs were damaged by reversed cells or by some other short-circuit situation.

Your cells probably need solder blobs to avoid hitting the LED pot, as well. First thing I did to my LT1 was desolder that pot, as I just don’t trust it with my laptop pulls with solder blobs.

The wraps appear slightly damaged around the top rim. Though they may have been damaged when pulling the cells from a laptop pack, they might also be hitting the positive ring and the rims appear to be the same height as the battery terminals, which is typical of flat-top laptop pulls. If so, this will eventually cause a short and is another reason to add blobs. Magnets should not be used in this case as they are often dislodged and may turn the lantern into a tiny furnace.

LOL Excellent solution.
Now we need details of the wash & dryer cycle :slight_smile:

I just washed and dried on the regular setting - so the dryer was hot and the washer was warm.

:smiley: :+1: :beer:

How long until there is lt1 maxx using 4x21700’s because i think it would be lolsy to have a lantern with 20ah battery life

that cell format may be possible for the LT2 ( Deluxe) version planned, that will have the power bank option. a 20ah power bank/lantern has some real benefits for run times and charging capacity. :+1:

Agree with ALL this 100%
Count me in. …again… :+1: :person_facepalming:

One small possibility. Some cells were sold that had wrappers that seemed possible to confuse unskilled users as to the correct orientation.

17 days from placing my order to my mailbox in ‘the South’ US……
That has to be some kind of record! :+1: :beer:
Thanks Sofrin for getting it out before CNY.

Hey folks I received a round one amazon code with batteries but my wallet wasn’t free enough for me to buy a lantern till today but I can’t seem to find an Amazon listing for the lantern, did I miss my chance to get one?

You can get one at Sofirnlight.com, and they have a coupon that makes the price the same as the group buy. I haven’t checked Amazon, and got sort of tired of the code business. They all ship from China, so I don’t think Amazon would save time.

I ordered another with batteries yesterday. Although they are currently not available according to this page

And then I get this email a few minutes ago.

How long do the CNY celebrations run for? And why would Sofirn stop taking orders? If I cancel the Amazon orders and order from Sofirnstore.com will they come any sooner?

I also encountered the same problem, because there is no stock currently, so I have to wait for the next batch. I also hope that it is the new version of LT2?

P.S The Lunar New Year holidays are on 1/24 ~ 1/29.

What about if I unscrewed the base the small amount just until the power button light goes out, will it still keep the cells balanced at the same voltage?

+1 on the LT2 extended super deluxe extra ultra mega max version

[quote=sueli428]

[quote=DBSAR]
The LT1 runs the cells in Parallel, and keeps the cells all at the same voltage.

If the cells are any good at all they should stay in balance even if they were removed from the light and stored separately for months. The few times I have bothered to record and check cells that have been stored for 6 to 12 months they have remained within hundreths of volts of each other. That is nothing to worry about.

Unscrewing one end or the other until the button light goes out mainly removes the parasitic load the button led causes. But that is so low a draw I would not worry about it unless I was putting the light away for an indeterminate period. Mine are mainly meant to be emergency use lights although I will also use them here and there and for camping. As such I want them mostly charged and available.