List updated.
And thanks a lot to you too MRsDNF.
And I have a lot to thanks to djozz too.
Without him, his post, and his springs, I would have never had this idea to do this kind of group buy. Me seeing his phosphor bronze springs was the start of a new high current era 
Maybe I should just name them the BSM LS Springs.
The BSM Lightspeed Springs haha 
Good name BSM…. I like it! :+1: …
Thanks again :+1: 
UPDATE 4
The final cost for 2000 springs has been confirmed by my supplier.
350$US for 2000 springs. I will check with the supplier how much it would cost for 3000pcs and 4000pcs springs.
I’ll ‘spring’ for a few more if it helps drop the price even more. :+1:
Cheaper price per spring means people will order more springs for almost the same money. 
Please up my order to 30 large and 30 small.
I’m a bit conservative, I will wait for the sample test. If they work out well I like to ’upgrade to 20’small 20 large.
And if the samples appear not good enough to go for the large order, I’m happy to donate a few dollars to compensate for the sample costs.
Yeah I am waiting for them to respond about the samples.
Another day, another update... again. Here what they said this time:
Hi Blue,
Good Day!!!
I have double checked:
Within 2000pcs: USD308
About 3000～5000pcs: USD460
Shipping small more expensive than 2000pcs.
Price is not too higher because of bulk purchases.
Pls kindly let me know if any questions.
Wow that is a good price. But I don't think we will ever reach that number :D
Could give them to Richard and ASF if the sample springs are great.
are we sure it is safe to use this type of metal in a flashlight. Navy divers use this combination of metals in a dive knife but you cannot sharpen it with out a respirator due to dust causing cancer.
It is safe yes in a flashlight yes. I’ve made the research about it, and unless you sharpen the spring or melt down the spring for some reason, there should be nothing to worry about at all. I do get the concern though, but there is no risk of that in a flashlight. And since we don’t use lasers to make springs, that is not a problem too.
Guys, I finally recovered the information I was looking for when talking about which battery spring material to use in terms of elasticity and YIELD STRENGTH!
Elasticity is good, but since all beryllium coppers feature about the same elasticity +/- 2%, I will leave that out.
What really matters is yield strength, which is how much force a material in spring form can sustain before resulting in a plastic deformation, such as the in the Intl Outdoor BeCu 45% IACS spring.
Here is some data about it:
Steel is the strongest at 1700MPa Typical
Phosphor bronze is in the middle at 895Mpa Typical
Beryllium Copper C17530 38% IACS is a bit behind at 820Mpa Typical
Beryllium Copper C17500 45% IACS is quite a lot behind at 620-680Mpa Typical
As you can see, the reason for the BeCU 45% IACS Intl Outdoor spring for failing in djozz’s tests is that it can’t resist as much to a deformation as well as the others, resulting in a quite a bit higher chance of plastic deformation such as the previously mentioned djozz spring test.
Yes, but the cost of $0.26 assumes all are sold. Not fair if Bluesword gets stuck holding unsold springs. If this was a business, that is one of the risks, but since this is a group buy we should consider sharing the cost of unsold stock. Just not sure how to do that fairly.
I agree.
If the sample test works I’ll take 30 large and 30 small. If the test doesn’t look good then I’ll kick in some to help with the sample.
Same here. If the samples are not as expected I would spend a few dollars to get the sample costs covered.
/\ :+1:
I’m in for helping cover the sample cost if the turn out to be crap .
Same here, let us know.
yes as well.
Please put me down for 30 of each, and if they turn out to be made of old paperclips, I’ll be happy send some money to help cover sample costs as well.
Thank you for setting this up :+1:
Wow.
I never expected such support.
Now, if 5$/spring do not turn out to be the bee’s knees, I will be quite angry.
I do doubt they would risk their reputation however for such a purchase, especially since it is really easy to check if the samples are crap using a multimeter and a power supply.
One last thing before I make the final request and pay for the samples: are there any parts/products you would like to have in a group buy?
Just a question, but seeing the potential of a group buy for us getting things at a much lower cost than initially possible makes me happy.