Is my Convoy S2+ Faulty?

Lexel · 2019-02-11T01:06:26.000Z

most things with LVP faults come from a defect on the voltage divider,
the S2+ should have 19.1k and 4.7k to generate about 0.7V on MCU pin 7 which gets compared to a internal voltage reference
it happens that one resistor end is not correctly reflow soldered and does not give electrical contact, as the LVP ready low this has to be on the 19.1k resistor

toddcshoe · 2019-02-11T01:17:47.000Z

AltaLumen:

Nice. I’m looking forward to a high quality 4000 kelvin light. The SST-20 also looks to be efficient, with a higher lumen output than the 219C, I think.

I have a Samsung LH351D 5000K 90cri I believe. A friend bought a bunch and sent a few my way. I can send you one on a 16mm Mountain board if you would like to try it out. No charge or anything. I don’t have any 4000K emitters but I don’t mind flowing a emitter on a board for you if it would make your light more enjoyable. Just PM an address and I can get it in the mail sometime tomorrow.

I put that emitter in a few of my Jetbeam Jet-I MK and they are quite pleasant.

AltaLumen · 2019-02-11T01:22:51.000Z

Lexel, my technical expertise is wood science (it’s true! Lol), so, I immensely appreciate your response, but have no idea what it means.

Lexel · 2019-02-11T01:26:49.000Z

AltaLumen:

Lexel, my technical expertise is wood science (it’s true! Lol), so, I immensely appreciate your response, but have no idea what it means.

go to your garage
take a soldering iron, with a small tip
stick it to the tiny part with 28C or 223 marking on both sides and see if that fixes the problem
holding the resistor with tweezers is helpful if you hit the good side it becomes loose if other is not soldered right

RobertB · 2019-02-11T01:36:14.000Z

Somewhat suspicious of the EVVA cell. This guy’s D4s with a EVVA 26650 is doing the exact same thing, and purchased from the same place. Probably just a coincidence though

You won’t hit 3A charging a cell phone like you would on the flashlight

AltaLumen · 2019-02-11T02:00:48.000Z

Toddcshoe, that’s incredibly generous! I’d love to try that! I’m such a newbie that I have to ask what diameter this would be? Would it fit in the S2+?

AltaLumen · 2019-02-11T03:31:34.000Z

Lexel:

AltaLumen:

Lexel, my technical expertise is wood science (it’s true! Lol), so, I immensely appreciate your response, but have no idea what it means.

go to your garage
take a soldering iron, with a small tip
stick it to the tiny part with 28C or 223 marking on both sides and see if that fixes the problem
holding the resistor with tweezers is helpful if you hit the good side it becomes loose if other is not soldered right

Interesting. I’ll try that tomorrow if possible. I’ll PM you wish quesrions I’d o ya e any troubles :-/. Thanks so much

EDIT: yikes, I only had one beer when I wrote that - I swear…

Interesting. I’ll try that tomorrow if possible. I’ll PM you wish questions if I have any troubles :-/. Thanks so much!

AltaLumen · 2019-02-11T02:10:00.000Z

RobertB:

Somewhat suspicious of the EVVA cell. This guy’s D4s with a EVVA 26650 is doing the exact same thing, and purchased from the same place. Probably just a coincidence though

You won’t hit 3A charging a cell phone like you would on the flashlight

Hmmmm. Well, I ordered the cell based on mtn’s reputation, which I assume is good. You’re right though. I don’t have any other way to test the discharge ability of the cell. All I know is that it seems to charge normally and charged my cell phone fine from the Nitecore F2… that’s about a 1A draw. Maybe the flashlight driver is trying to start at 2800mA (100%) and the cell is too worn for that???

BlueSwordM · 2019-02-11T02:12:34.000Z

Nah, it’s probably not the battery.

Probably something else in the driver.

AltaLumen · 2019-02-11T04:11:05.000Z

[quote=Jack Kellar]

AltaLumen:

Just be careful not to run it pell mell at 100% power too long, the S2+ doesn’t have the cooling potential to safely maintain that much output. I like to keep my S2 at mode group 8 (max mode 50% of full power) and will do the same when my Nichia S2+ gets to me.

Did you order the Nichia with a 7135 x8?

Jack_Kellar · 2019-02-11T04:14:36.000Z

AltaLumen:

Jack Kellar:

Just be careful not to run it pell mell at 100% power too long, the S2+ doesn’t have the cooling potential to safely maintain that much output. I like to keep my S2 at mode group 8 (max mode 50% of full power) and will do the same when my Nichia S2+ gets to me.

Did you order the Nichia with a 7135 x8?

Sure did. Mostly my lumen usage is modest (below 10%), but if I need the extra blast (well, as much ‘blast’ as you can get from a Nichia anyway), it’s a quick mode selection away.

AltaLumen · 2019-02-11T04:25:13.000Z

RobertB:

Somewhat suspicious of the EVVA cell. This guy’s D4s with a EVVA 26650 is doing the exact same thing, and purchased from the same place. Probably just a coincidence though

You won’t hit 3A charging a cell phone like you would on the flashlight

Out of curiousity, where do you get your batteries? I have two more of the exact same batteries on the way from Mtn Electronics. I’ll charge those up and see if I get the same result. Unfortunately, these are my first and only 18650s, so I don’t have anything else to try.

RobertB · 2019-02-11T07:21:05.000Z

AltaLumen:

RobertB:

Somewhat suspicious of the EVVA cell. This guy’s D4s with a EVVA 26650 is doing the exact same thing, and purchased from the same place. Probably just a coincidence though

You won’t hit 3A charging a cell phone like you would on the flashlight

Out of curiousity, where do you get your batteries? I have two more of the exact same batteries on the way from Mtn Electronics. I’ll charge those up and see if I get the same result. Unfortunately, these are my first and only 18650s, so I don’t have anything else to try.

I’m sure there are some local vape shops in Calgary. You could go over and try a fully charged unprotected 18650, like a high drain Samsung, LG or Sony, and rule out a battery problem.

AltaLumen · 2019-02-11T19:44:43.000Z

RobertB:

AltaLumen:

RobertB:

Somewhat suspicious of the EVVA cell. This guy’s D4s with a EVVA 26650 is doing the exact same thing, and purchased from the same place. Probably just a coincidence though

You won’t hit 3A charging a cell phone like you would on the flashlight

Out of curiousity, where do you get your batteries? I have two more of the exact same batteries on the way from Mtn Electronics. I’ll charge those up and see if I get the same result. Unfortunately, these are my first and only 18650s, so I don’t have anything else to try.

I’m sure there are some local vape shops in Calgary. You could go over and try a fully charged unprotected 18650, like a high drain Samsung, LG or Sony, and rule out a battery problem.

Good call. Thanks for the suggestion.

DOC1500 · 2019-02-11T19:49:23.000Z

Chinese New Year may be over, they are starting to ship my convoys.

AltaLumen · 2019-02-11T20:25:04.000Z

DOC1500:

Chinese New Year may be over, they are starting to ship my convoys.

Yup! I received a shipping notification for my order this morning! I paid an extra dollar or two for 16-26 day shipping lol. That’s in contrast to regular which is up to 2 months? I don’t know.

AltaLumen · 2019-02-12T01:11:07.000Z

RobertB, as it turned out, there is a vape shop just a few blocks from my work… who knew… strange culture, vaping… Anyway, I picked up two Samsung INR18650-30Q cells, and tried them on my Convoy. Nope! Same issue. So, it’s fair to say at this point that it’s not the cell.

I found it slightly interesting that the cells came pretty much fully charged at 4.10V and 4.11V.

SIGShooter · 2019-02-12T04:54:53.000Z

AltaLumen:

RobertB, as it turned out, there is a vape shop just a few blocks from my work… who knew… strange culture, vaping… Anyway, I picked up two Samsung INR18650-30Q cells, and tried them on my Convoy. Nope! Same issue. So, it’s fair to say at this point that it’s not the cell.

I found it slightly interesting that the cells came pretty much fully charged at 4.10V and 4.11V.

Maybe they were returns? I once bought some Panny 18650B’s from a highly recommended Ebay vendor and when I got them they were at 4.2v. I asked them why that was the case and he said they were returns and he also decided to test a charger on them :rage:

RobertB · 2019-02-12T04:56:47.000Z

AltaLumen:

RobertB, as it turned out, there is a vape shop just a few blocks from my work… who knew… strange culture, vaping… Anyway, I picked up two Samsung INR18650-30Q cells, and tried them on my Convoy. Nope! Same issue. So, it’s fair to say at this point that it’s not the cell.

I found it slightly interesting that the cells came pretty much fully charged at 4.10V and 4.11V.

They probably charged them to test and ready to sell. The 30Q’s are one of the best all around batteries you can buy.

AltaLumen · 2019-02-12T05:34:32.000Z

I’ll assume the latter as there is no sign of wear/marks on the terminals.