Jharpphoto
Newly Enlightened
I just bought a jetbeam RRT0 yesterday and want to take advantage of its max lumen rating. Jetbeam suggests using an RCR123 to get the 550 lumens from the light. Which RCR123 would you recommend?
I just bought a jetbeam RRT0 yesterday and want to take advantage of its max lumen rating. Jetbeam suggests using an RCR123 to get the 550 lumens from the light. Which RCR123 would you recommend?
It's actually 550mAh, so RRT0's current draw is over 2C, which is over max. allowed for LiCoO2 chemistry. That's unsafe.AW RCR123 750 MAH, with built in protection. Best cells around IMO. and a DMM to go with it
I won't buy a unprotected cell, but that's just me.
It's actually 550mAh, so RRT0's current draw is over 2C, which is over max. allowed for LiCoO2 chemistry. That's unsafe.
2C for that cell is 1.1A because it's 550mAh, 750mAh is "label capacity".There seems to be some confusion then.
http://www.cpfmarketplace.com/mp/sh...50-Lumen!-lt&p=2709940&viewfull=1#post2709940
http://www.cpfmarketplace.com/mp/showthread.php?144427-NEW-Hi-current-Protected-R123s
it says it's good up to 1.5A 2c,
if this is all true (i am not doubting it is) then Jetbeam should have no business listing this as a recommended power source. especially since most people use el cheap rcr123s and not a good AW cell that can keep you out of trouble a bit more
Life is not always fair. Good for the battery industry though. :twothumbs
I'm confused by the repeated assertions that greater than 1C charge and greater than 2C discharge are "dangerous". Exactly how do you quantify "dangerous"? I ask because the evidence says that people do this all the time with no problems.
Look at HJK's review of the AW16340 protected. He discharges it at 3 Amps, which is almost 6C if you use the 550mAh figure. He then tests the over current circuit at 5 Amps, which is closer to 9C. He didn't mention the battery being hot or exploding.
AW himself says the batteries are good for 1500 mA. He also says 2C, but 1500 mA is 1500 mA. It's not magically 1100 mA. It's 1500. So what's the real number? What is "safe"?
I know safety is a concept that's not black or white. Generally speaking, there is a percentage risk involved in performing a dangerous activity. You'd think the manufacturers could quantify this somehow. I can't seem to find the real spec sheets on the cells that AW's 16340s are made from. But all the other sheets I find from Panasonic don't quantify this.
My gut instinct says that 1C charge and 2C discharge are EXTREMELY safe areas and going slightly over on either one of them probably has a nominal increase in danger. I'd love to hear some discussion on this other than the repeated rule of thumb.
Thanks,
Brian.
[citation needed]AW is quality cells and you can discharge them at 3 C (1500 mA) with no problems. It won't explode or vent or anything - just shortens the overall life of the cell.