just ordered 18650s for u2

well, i just ordered some fully protected 18650s for the u2 from batteryjunction... I took out the plastic sleave, and there is WAY too much rattle on both cr123s and with my r123s (which i guess are the same width as the 18650s).... so, what should i do to eliminate the rattle when the 18650s come in? The good thing is that the plastic sleave goes right back in.

-David

cheapo said:

well, i just ordered some fully protected 18650s for the u2 from batteryjunction... I took out the plastic sleave, and there is WAY too much rattle on both cr123s and with my r123s (which i guess are the same width as the 18650s).... so, what should i do to eliminate the rattle when the 18650s come in? The good thing is that the plastic sleave goes right back in.

-David

Click to expand...

The 18650's should be fatter than the CR123's and R123's.... there should be no rattle (or at least minimal rattle). I actually had to go through a couple of 18650's just to find one that would fit inside my U2.

WP

i dont see how the 18650 could be so thick... there is just soo much room in there... is the platic sleave supposed to be so thick? anyone got a pick next to a r123 or cr123?

-david

WP

cheapo said:

well, i just ordered some fully protected 18650s for the u2 from batteryjunction... I took out the plastic sleave, and there is WAY too much rattle on both cr123s and with my r123s (which i guess are the same width as the 18650s).... so, what should i do to eliminate the rattle when the 18650s come in? The good thing is that the plastic sleave goes right back in.

-David

Click to expand...

Hi David,

I just tested one of my BatteryJunction protected 18650's with my sleeve-removed U2. No rattle at all. BTW, my best research indicates that it's fine to run unprotected 18650's in your U2, since the U2's regulator cuts out somewhat above the overdischarge point of unprotected cells. 4stevens had a killer sale on LG 2400mAh unprotected cells. That is what I run in mine. There was a whole thread going on runtimes for the U2 using these cells.

I got my U2 sleeve out in-tact and just slip it back in for primary cell use.

Hope this helps,
Bill

thanks guys, i was a wee bit worried there, i dont like battery rattle at all... anyway, i decided to go with protected ones because i will probably use them in other lights too. and i assume they are thicker too, eliminating the battery rattle.

btw, the batteryjunction batts should perform about the same as the lg ones right? Also, the LGs dont fit with the sleave in do they?

do you think it'll fit in pm6 battery tube?

-david

cheapo said:

btw, the batteryjunction batts should perform about the same as the lg ones right? Also, the LGs dont fit with the sleave in do they?
-david

Click to expand...

BatteryJunction 18650 = 2200mAh / LG 18650 = 2400mAh so there is a difference in runtime.

Neither B-junction or LG cells will fit with the sleeve in.

If you have some free time and want to read up on the LG runtimes, go here:
https://www.candlepowerforums.com/threads/128188&highlight=2400+u2

Great testing for the U2 done by chevrofreak. He really did a science project.

Cheers,
Bill

LG also just came out with 2600 mAh 18650's...almost 2 hours runtime on my U2 with all 6 levels of brightness.

cd-card-biz said:

BatteryJunction 18650 = 2200mAh / LG 18650 = 2400mAh so there is a difference in runtime.

Neither B-junction or LG cells will fit with the sleeve in.

If you have some free time and want to read up on the LG runtimes, go here:
https://www.candlepowerforums.com/threads/128188&highlight=2400+u2

Great testing for the U2 done by chevrofreak. He really did a science project.

Cheers,
Bill

Click to expand...

well, it doesnt look like such a big difference between LG 2400 and 2200s :

2200 mah:

http://cones-stuff.co.uk/Torches/Runtime Graphs/Surefire U2 Level6 Bare 18650 Li-Ion.JPG

http://cones-stuff.co.uk/Torches/Runtime Graphs/Surefire U2 Level5 Bare 18650 Li-Ion.JPG

http://cones-stuff.co.uk/Torches/Runtime Graphs/Surefire U2 Level4 Bare 18650 Li-Ion.JPG

2400 mah:

https://www.candlepowerforums.com/threads/128188&highlight=2400+u2

hardly a difference

-David

They were two different lights. Not all lights will run the same even on the same batteries. LED and circuit variations can have an effect on runtime.

are you saying that because there is no difference between the 2 bats? I strongly doubt there is any circuit variation between those two lights.

-David

cd-card-biz said:

BatteryJunction 18650 = 2200mAh / LG 18650 = 2400mAh so there is a difference in runtime.

Neither B-junction or LG cells will fit with the sleeve in.

If you have some free time and want to read up on the LG runtimes, go here:
https://www.candlepowerforums.com/threads/128188&highlight=2400+u2

Great testing for the U2 done by chevrofreak. He really did a science project.

Cheers,
Bill

Click to expand...

I have the 2400mah LG cells in stock as well - don't forget to use the coupon code in this thread for 10% off.LINK

I have purchased lights and cells from Matt and can vouch for his factory fresh items and the fastest shipping I have ever had from a CPF dealer.

Thanks for the discount link, Matt. Missed it on my last order.

Bill

cheapo said:

are you saying that because there is no difference between the 2 bats? I strongly doubt there is any circuit variation between those two lights.

-David

Click to expand...

There can be a lot of variation from light to light, as we've seen lately when people have bought multiples of the same model and did runtime/output tests on them.

You cant compare the two batteries in two different lights, they both need tested in the same light.

cd-card-biz said:

I have purchased lights and cells from Matt and can vouch for his factory fresh items and the fastest shipping I have ever had from a CPF dealer.

Thanks for the discount link, Matt. Missed it on my last order.

Bill

Click to expand...

Bill,

My pleasure and thanks for your kind words. If you shoot me an email with your order number I should be able to apply the code for you.