Only the 17mm driver is like this, the rest is unchanged
The effect on heat has not been tested.
That’s good, thank you. But do you have any plans to introduce a small coated spring?
A video says it all:
Avoid or slim down those quotes, please.
Simon also did another long one at the top of this page. I understand this basically concerns smartphones or tablets, but it is good to be seen anyway.
P.S.: don't worry Agro, the video is hidden.

Simon Mao:Agro:
Simon Mao:Agro:
Barkuti:
A few minutes ago I finished modding my ∅17mm SST40 biscotti clone drivers, one of them will (hopefully) go in an old, modified Thrunite T20T and for this reason I removed the stock spring (there’s barely place for a copper top cell driver contact inside that tiny flashlight).
So I grabbed a couple BlueSwordM’s springs, 3rd and 2nd gen big springs, and proceeded to make a crude voltage drop over the spring test against the new springs Simon is using in the biscotti clone drivers. I used my precision power supply tuned at 5A, with alligator clamps attached to the ends of the springs as best as I could. Connecting at the base of the springs was easy, the top gave me some difficulties, and I placed my multimeter’s probes as best as I was able (near the base beside the clamp and as close to the top as I could make a decent contact):
Newer wide top spring from Simon: in a first run I was getting 60 - 65mV. Tried two more times, got values jumping up and down up to 70 and below 60mV. On average, I give it a rough score of 62 - 63mV of drop.
BlueSwordM’s 3rd gen big spring: could see some figure above 60mV, but all around 57 - 58mV give or take rough drop score.
BlueSwordM’s 2nd gen big spring: this was fast, could clearly see figures settling around 45 - 46mV rough drop score. Bear in mind the 2nd gen spring has one coil less than the 3rd gen, and it somewhat deforms once compressed.
Now, despite the limitations of the test and the possible percentage of error, all I can say is the stock springs coming with the newer drivers are awesome! Let’s wait to see what Simon has to say, but they must be made of C17530 or something with similar IACS conductivity to perform this good. It’s either this or I did some blunder with my procedure, although I don’t (yet) see how.
Thu, 05/21/2020 - 21:46
Simon, any chance to purchase the springs alone?
ok ,i add the link of spring here
Thanks. BTW, are these springs made from the same material?
Yes, they use the same material, and the quality of the coated spring will be better.
That’s good, thank you. But do you have any plans to introduce a small coated spring?
bottom diameter : 9.5mm
top diameter: 6.8mm
thickness : 0.9mm
height : 13.5mm(before use),12.5mm(after use) (Phosphor bronze springs will become shorter after one use due to the material properties)
What size is more suitable for your needs?
+
+
=
Used turpentine as lubricant and cleaning fluid to aid with the filing process. No flames were involved. O:)

Strange addition to tail spring bypass I haven’t seen before.
The spring shenanigans are escalating. I actually appreciate the more conservative Convoy drivers because I don’t have to worry about this silliness. In 99% of practical use, 2 amps through a modern LED are more than enough, and these drivers do 6A. All my Convoy spring bypasses failed right away, but at 6A, I feel comfortable just ignoring it.
Agro:
Simon Mao:Agro:
Simon Mao:Agro:
Barkuti:
A few minutes ago I finished modding my ∅17mm SST40 biscotti clone drivers, one of them will (hopefully) go in an old, modified Thrunite T20T and for this reason I removed the stock spring (there’s barely place for a copper top cell driver contact inside that tiny flashlight).
So I grabbed a couple BlueSwordM’s springs, 3rd and 2nd gen big springs, and proceeded to make a crude voltage drop over the spring test against the new springs Simon is using in the biscotti clone drivers. I used my precision power supply tuned at 5A, with alligator clamps attached to the ends of the springs as best as I could. Connecting at the base of the springs was easy, the top gave me some difficulties, and I placed my multimeter’s probes as best as I was able (near the base beside the clamp and as close to the top as I could make a decent contact):
Newer wide top spring from Simon: in a first run I was getting 60 - 65mV. Tried two more times, got values jumping up and down up to 70 and below 60mV. On average, I give it a rough score of 62 - 63mV of drop.
BlueSwordM’s 3rd gen big spring: could see some figure above 60mV, but all around 57 - 58mV give or take rough drop score.
BlueSwordM’s 2nd gen big spring: this was fast, could clearly see figures settling around 45 - 46mV rough drop score. Bear in mind the 2nd gen spring has one coil less than the 3rd gen, and it somewhat deforms once compressed.
Now, despite the limitations of the test and the possible percentage of error, all I can say is the stock springs coming with the newer drivers are awesome! Let’s wait to see what Simon has to say, but they must be made of C17530 or something with similar IACS conductivity to perform this good. It’s either this or I did some blunder with my procedure, although I don’t (yet) see how.
Thu, 05/21/2020 - 21:46
Simon, any chance to purchase the springs alone?
ok ,i add the link of spring here
Thanks. BTW, are these springs made from the same material?
Yes, they use the same material, and the quality of the coated spring will be better.
That’s good, thank you. But do you have any plans to introduce a small coated spring?
bottom diameter : 9.5mm
top diameter: 6.8mm
thickness : 0.9mm
height : 13.5mm(before use),12.5mm(after use) (Phosphor bronze springs will become shorter after one use due to the material properties)
What size is more suitable for your needs?
Interesting. Do phosphor-bronze springs lose their springiness over time, or if overcompressed?
No more nested quotes!!!
Agro:
Simon Mao:Agro:
Simon Mao:Agro:
Barkuti:
A few minutes ago I finished modding my ∅17mm SST40 biscotti clone drivers, one of them will (hopefully) go in an old, modified Thrunite T20T and for this reason I removed the stock spring (there’s barely place for a copper top cell driver contact inside that tiny flashlight).
So I grabbed a couple BlueSwordM’s springs, 3rd and 2nd gen big springs, and proceeded to make a crude voltage drop over the spring test against the new springs Simon is using in the biscotti clone drivers. I used my precision power supply tuned at 5A, with alligator clamps attached to the ends of the springs as best as I could. Connecting at the base of the springs was easy, the top gave me some difficulties, and I placed my multimeter’s probes as best as I was able (near the base beside the clamp and as close to the top as I could make a decent contact):
Newer wide top spring from Simon: in a first run I was getting 60 - 65mV. Tried two more times, got values jumping up and down up to 70 and below 60mV. On average, I give it a rough score of 62 - 63mV of drop.
BlueSwordM’s 3rd gen big spring: could see some figure above 60mV, but all around 57 - 58mV give or take rough drop score.
BlueSwordM’s 2nd gen big spring: this was fast, could clearly see figures settling around 45 - 46mV rough drop score. Bear in mind the 2nd gen spring has one coil less than the 3rd gen, and it somewhat deforms once compressed.
Now, despite the limitations of the test and the possible percentage of error, all I can say is the stock springs coming with the newer drivers are awesome! Let’s wait to see what Simon has to say, but they must be made of C17530 or something with similar IACS conductivity to perform this good. It’s either this or I did some blunder with my procedure, although I don’t (yet) see how.
Thu, 05/21/2020 - 21:46
Simon, any chance to purchase the springs alone?
ok ,i add the link of spring here
Thanks. BTW, are these springs made from the same material?
Yes, they use the same material, and the quality of the coated spring will be better.
That’s good, thank you. But do you have any plans to introduce a small coated spring?
bottom diameter : 9.5mm
top diameter: 6.8mm
thickness : 0.9mm
height : 13.5mm(before use),12.5mm(after use) (Phosphor bronze springs will become shorter after one use due to the material properties)
What size is more suitable for your needs?
Basically the smaller the better. I have some good larger springs already. Your small phosphor bronze is OK but if it was available coated - I would prefer that.
My finger got tired from scrolling the above comment just to reach the end for the useful part…

Simon Mao:Agro:
Simon Mao:Agro:
Simon Mao:Agro:
Barkuti:
A few minutes ago I finished modding my ∅17mm SST40 biscotti clone drivers, one of them will (hopefully) go in an old, modified Thrunite T20T and for this reason I removed the stock spring (there’s barely place for a copper top cell driver contact inside that tiny flashlight).
So I grabbed a couple BlueSwordM’s springs, 3rd and 2nd gen big springs, and proceeded to make a crude voltage drop over the spring test against the new springs Simon is using in the biscotti clone drivers. I used my precision power supply tuned at 5A, with alligator clamps attached to the ends of the springs as best as I could. Connecting at the base of the springs was easy, the top gave me some difficulties, and I placed my multimeter’s probes as best as I was able (near the base beside the clamp and as close to the top as I could make a decent contact):
Newer wide top spring from Simon: in a first run I was getting 60 - 65mV. Tried two more times, got values jumping up and down up to 70 and below 60mV. On average, I give it a rough score of 62 - 63mV of drop.
BlueSwordM’s 3rd gen big spring: could see some figure above 60mV, but all around 57 - 58mV give or take rough drop score.
BlueSwordM’s 2nd gen big spring: this was fast, could clearly see figures settling around 45 - 46mV rough drop score. Bear in mind the 2nd gen spring has one coil less than the 3rd gen, and it somewhat deforms once compressed.
Now, despite the limitations of the test and the possible percentage of error, all I can say is the stock springs coming with the newer drivers are awesome! Let’s wait to see what Simon has to say, but they must be made of C17530 or something with similar IACS conductivity to perform this good. It’s either this or I did some blunder with my procedure, although I don’t (yet) see how.
Thu, 05/21/2020 - 21:46
Simon, any chance to purchase the springs alone?
ok ,i add the link of spring here
Thanks. BTW, are these springs made from the same material?
Yes, they use the same material, and the quality of the coated spring will be better.
That’s good, thank you. But do you have any plans to introduce a small coated spring?
bottom diameter : 9.5mm
top diameter: 6.8mm
thickness : 0.9mm
height : 13.5mm(before use),12.5mm(after use) (Phosphor bronze springs will become shorter after one use due to the material properties)
What size is more suitable for your needs?
Basically the smaller the better. I have some good larger springs already. Your small phosphor bronze is OK but if it was available coated - I would prefer that.
Ooh, that sounds interesting. Coated with what? Tinned for better soldering? Au-plated for lower resistance?
The large springs are Au coated
What kind of formatting do you guys have set up on your browser? These nested quotes like… one swipe of the mouse wheel or my phone screen for me to scroll past.
Please stop the quoting quoting quoting folks!
There were threads locked and blocked (this is, difficult to open) due to the trolling of quoting quoting quoting…
No need to play with it now
Please stop unnecessary quoting!
It makes the thread unreadable!
Only after the first use, the spring will be slightly shortened, and the height will not change in future use.
ktnx!

Avoid or slim down those quotes, please.

No more nested quotes!!!!

Please stop the quoting quoting quoting folks!
This isn’t a complete solution, but it is at least possible to eliminate the issue on a per-browser basis. Using a stylesheet override extension like Stylus, create a style and paste this in:
/* hide quotes deeper than 3 levels */
blockquote.quote-msg blockquote.quote-msg blockquote.quote-msg blockquote.quote-msg {
display: none !important;
}
… and tell it to apply the style on a domain level to budgetlightforum.com. This removes deeply nested quotes.
To adjust the nesting threshold, add or remove repetitions where it says “blockquote.quote-msg” a few times. Like, if you want to limit it to 2 instead of 3, remove one of the repetitions.
Does someone already knows how the “battery check” function works in the SST-40 Biscotti-clone drivers?
With a cell hovering around 3.9V I am getting 5 blinks. :???: