MTN Electronics: LEDs - Batteries - Lights - Chargers - Hosts - Drivers - Components - 1-Stop-US Source

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DB Custom
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Unknown, start at the beginning, makes it much easier than starting in the middle and having to back up to go forward. Wink

The parts you forgot why you ordered? Those are for me, just forward them on over here and I’ll sort em out for you…

RMM
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New:

  • Convoy M1 Host 
  • 4 x 18650 DIY USB Battery Box (no charging circuitry)
Re-Stock:
  • Convoy S2 Host
  • 20mm Partition Board / Contact MCPCB
Monday 12/23:
  • Lots of Noctigon Stuff (everything except for more T6-4C)
  • Qlite Drivers
  • Nitecore i4 Chargers

 

Mountain Electronics : batteries, Noctigon, and much more! What's new? 

RMM
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Ok guys, beyond the adjustable LM2596 I have been on a small quest to find an inexpensive and simple charger (under $3.25) for the 4.35v cells.  I have played with a few different ideas and have finally settled on something that meets those goals.  You might think it's goofy, but it works well!  I have tested it several times with the LG D1 cell, measuring charge current and voltage along the way.  Charge starts at around 0.3A at 3.9 volts and gradually works it way down to nothing when the cell hits 4.36v, where it has consistently terminated, a decent CC/CV charge curve.  The best way to use this charger if you're in a hurry is to charge the cells to 4.2v in a faster charger then finish it off with this.  Any guesses as to what it is?  A YiboYuan Samsung Galaxy Note 2 external battery charger! That phone comes with a 4.35v battery from the factory. No need to open up the internals of the charger, you can use alligator clips or solder directly to battery contact prongs.  Cheap enough to have a couple Smile

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Helios-
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Did you crack one open to check what chip its using? :ghost:


Counterfeit 18650s, 2,<a href=“http://

MRTdiver
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Re-stock time for Protected Panasonic 3400mAh 18650s?    Estimate?

 

thx

נֵר־לְרַגְלִ֥י דְבָרֶ֑ךָ וְ֝אֹ֗ור לִנְתִיבָתִֽי   (Psa 119:105)   

RMM
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MRTdiver wrote:

Re-stock time for Protected Panasonic 3400mAh 18650s?    Estimate?

Hopefully by next weekend.  

As to the chip, I did take it apart and couldn't find anything identifiable in there.  I was going to adapt the MCP73831 chip to one of the existing boards, but the parts alone are more expensive than this entire charger.  Sure, it's a bit slower but really not too bad.  The faster solution is still the LM2596 buck board, but this works with no adjustment and no external power supply.  

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Helios-
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Honestly, I wouldn’t recommend cheap AC powered chargers sold direct from china. :~ Often they just don’t obey any laws or regulations concerning safety.

There is a usb powered 4.35v external battery charger for the Samsung Galaxy S3. Its $6 but it doesn’t carry the danger of cheap chinese AC powered devices. Wouldn’t need to go through the adjustment of the LM2596 boards. With a usb charger like this Galaxy S3 one or a MCP73831/2 you can add a tp4065 or other usb charger in parallel to boost its current. One of cottenpicker’s chargers does the same, using a 4.2 chip in parallel with a 4.35v chip.


Counterfeit 18650s, 2,<a href=“http://

wight
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Good idea RMM. When I started looking at the 4.35v cells I got hung up on the fact that there must be charging ICs for use within phones which use 4.35v cells. A retrofit with an MCP73831 was all I could think of, cost made me give it up. External chargers never crossed my mind!

For more current, maybe we should try the Yiboyuan SS-1 AC, which states 600mA. Yiboyuan has at least 3 different 600mA 4.35v chargers, but the SS-1 seemed least expensive.

I’ve seen others doing that charger swap you mention to speed things up, but I wonder what effect it has. It seems to me that doing a complete CC/CV charge to 4.2v and then starting over with CC/CV to 4.35v might do something undesirable?

Break’s over for now. That was a long one! wight catchup Wink Wink Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

Helios-
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Doing a full cc/cv 4.2v charge then switching to a 4.35v cc/cv won’t do any harm. Its just slower & sort of annoying.


Counterfeit 18650s, 2,<a href=“http://

wight
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I’ve never fully understood exactly what makes a CC/CV charge cycle so good in the first place, so I wasn’t sure.

Is it simply that the CC phase protects the cell from overcurrent and CV kicks in once we reach the maximum voltage for the cell? Would a pure CV charger result in anything undesirable other than a slow charge?

Break’s over for now. That was a long one! wight catchup Wink Wink Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

comfychair
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All CV would give a faster charge - too fast. Say you start with a resting voltage of 3.6v, if you apply the full charge voltage across it at that point, the cell will accept many many amps. The CC phase is required to limit the current until the difference between the actual cell voltage and desired finish voltage are closer together. Less spread between actual & desired self-limits the current to a safe range, so holding a constant voltage just a tad over the desired full charge voltage until it finishes is fine.

When I manually charge the 4.3v cells starting from 4.2v as they come off the hobby charger, it's all CV as that difference between 4.2 and 4.3 is small enough that limiting the current isn't needed to stay in a 'safe' range. It limits the current on its own.

wight
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Duh, brain fart. First I write that CC clamps the current to protect the cell from overcurrent, then I suggest that CV only would be slow…. clearly a lack of thought. Thanks!

Break’s over for now. That was a long one! wight catchup Wink Wink Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

borked
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DBCstm wrote:
Aww come on Justin! Everybody knows BLF is THE Home of HiJacked threads!

Are you trying to suggest we’re hi-brow here ?
Last thing we need is to become a clone of that other place Wink
RMM
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wight wrote:
Yiboyuan SS-1 AC, which states 600mA. Yiboyuan has at least 3 different 600mA 4.35v chargers

Will have to try one of those next Smile  Just wanted you to know that this has been the best one so far (I've tried a few others).  I have used Yiboyuan phone battery chargers for years with my Droid X and now HTC Rezound, no problems with them whatsoever.  

FYI:

More small flashlight holsters in stock, along with the butterfly style XM-L emitter spacers. 

Mountain Electronics : batteries, Noctigon, and much more! What's new? 

DB Custom
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Here we talk freely and openly, which inspires suggestions and innovation. Like what Richard is doing with the 4.35V chargers and the feedback.

You don’t have to be on here long at all to have people run amok in your thread, but they most always come back around. Wink

Richard, any sign of the Convoy C8’s ? No hurry, just wondering.

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DBCstm wrote:
Here we talk freely and openly, which inspires suggestions and innovation. Like what Richard is doing with the 4.35V chargers and the feedback. You don't have to be on here long at all to have people run amok in your thread, but they most always come back around. Wink Richard, any sign of the Convoy C8's ? No hurry, just wondering.

Indeed, should see them something this next week.

About the charger, no it isn't the most eloquent solution, but it works great and has been reliable. Besides, this is budget light forum, right?  I have been testing it all week long to make sure that it was good to go before announcing it here.  None of the other solutions I've tried or looked at up until this were going to be cheap enough to be worth it, to me at least.  

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comfychair
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Has anybody tried a MTG2 in the Convoy C8's OP reflector?

DB Custom
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I can see if it’ll slip over the one in my copper light engine, see how the beam acts.

RMM
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comfychair wrote:

Has anybody tried a MTG2 in the Convoy C8's OP reflector?

Not yet, I guess it might fit with the copper pill? The factory aluminum pill only fits 16mm MCPCBs.

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DB Custom
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Not as easy as that, emitter hole will have to be opened up. I will be doing this in the next couple of weeks, have a project going on to compare apples to apples in a Cree Trifecta using Convoy C8’s as the hosts.

comfychair
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RMM wrote:
The factory aluminum pill only fits 16mm MCPCBs.

Yeah, and...? :bigsmile:

http://75.65.123.78/Dsc05536.jpg

http://75.65.123.78/Dsc05992.jpg

tallboybass
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Anyone tried an MTG2 in the Convoy M1 host?

richnpc
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RMM
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Hey!  Been super busy with all the orders and holiday events these past few days, but here are some updates (are either currently up on the site, or will be there in a few hours):

New:

  • Bare XM-L2 1A LEDs
  • Bare XM-L2 1D LEDs
  • Bare XP-G2 R5 3C LEDs
  • Bare XP-G2 R4 5A1 LEDs (for you warm tint afficionados!)
  • 14mm XM-L2 3C (aluminum star)
  • XM-L2 T3 7A3 on 16mm and 20mm Noctigon
  • P60 Bare Dropins - Orange Peel & Smooth Reflectors
  • 20, 24, & 26 AWG Silicone Wire
  • Arctic Alumina Thermal Compound (14g) 
  • Convoy S3-like host (identical except it doesn't say "Convoy")
Restock:
  • 20mm & 42mm AR Lens
  • qlite drivers
  • Plastic 3M Emitter Insulating Gaskets - XP and XM
  • XP-E2 R4 1C on 16mm Noctigon
  • XM-L2 T6 3C on 16mm & 20mm Noctigon
  • XM-L2 T4 5B1 on 16mm & 20mm Noctigon

Probably some other stuff I'm forgetting right now, but that's most of it!

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Chazzy
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Awesome job Richard!
Packaging is nice and those little boxes make great storage. :bigsmile:

"Whoa that's a bright light!" ... Yea I guess.

RMM
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You'll notice that I am now offering an assembly service for flashlight hosts and P60 dropins.  Look soon for de-domed LEDs and a few more things! Laughing 

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unknown00101
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RMM wrote:

You’ll notice that I am now offering an assembly service for flashlight hosts and P60 dropins.  Look soon for de-domed LEDs and a few more things! Laughing 

Pretty decent price for assembly service.

For the S2 and S3’s you have “Just check the box and also add your choice of 17mm driver and 20mm LED to your shopping cart.”

Kodachrome40
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RMM wrote:

You’ll notice that I am now offering an assembly service for flashlight hosts and P60 dropins.  Look soon for de-domed LEDs and a few more things! Laughing 

That’s great news. I just placed an order for a custom P60 Drop-in.
Its going to have:

-XM-L2 T4 7A3 80+ CRI
-QLITE REV.A 7135*8 3.04A Driver (5mA – 2% – 25% – 100%)
-Orange Peel reflector

I am going to use the firefly mode as sort of locator glow and 2% as my night light.

can’t wait! Smile

MRTdiver
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some website issues...

when clicking on the top tab - "Flashlight Hosts"  your flashlight hosts are hidden.   Some people new to your site might not even see that you have light hosts.

 

You might consider moving your flashlight hosts under "Flashlights" tab.

and move empty P60 drop-ins under "Components".

 

Maybe on your Silicone Wire page add an Ampacity Chart like (wiki), since this is one of the more important specs when choosing AWG.   ppl should know... what is the recommended max current for a certain wire size.

After-all the site is quickly becoming a modder's haven.

 

as always great work Richard. Smile

נֵר־לְרַגְלִ֥י דְבָרֶ֑ךָ וְ֝אֹ֗ור לִנְתִיבָתִֽי   (Psa 119:105)   

DB Custom
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Site’s working fine over here MRT, hosts show as well as the empty drop-ins. Click hosts in the top row for the hosts, click the drop down menu for P-60 drop-ins to get the empty shells.

And for what it’s worth, the amperage capability of a wire is going to vary according to it’s type of copper, number of strands and various other factors. Wiki’s description is way on the safe side, in my humble opinion. Tenergy Silicone 22ga wire is easily capable of more than double that chart. Or at least, it’s giving me siginificantly higher numbers in my lights. Wink

And as a caution, there are just some things you don’t want to buy the budget versions of. I just received 22 ga silicone coated wire from a vendor I had not purchased it from previously. The silicone is so thick on the 22 ga that it’s bigger than Tenergy 20ga and won’t fit in my smaller lights at all. Sometimes it’s best to stick with the known name brand.

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