any good RCR2 batteries?
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SmurfTacular
Enlightened
Oh yeah. Juice makes good batteries. I have two CR2 juice batteries. Regular CR2 batteries are 3 volts, the juice ones are 3.6 I believe.
SmurfTacular
Enlightened
Im not sure about the mAh. But Juice is a good battery brand in my book.
SmurfTacular
Enlightened
Chauncey Gardner
Enlightened
I think he may have been selling a flashlight on ebay earlier...
http://www.cpfmarketplace.com/mp/showthread.php?t=190530
I should have added ai know right, I was waiting for something like that.
, because I meant it in jest as much as cautionary. I've never taken a belt sander to a Li-ion, but I've certainly had my share of "Oops! That was interesting." moments. Cheers for being a good sport.Back on topic...
Requests for protected RCR2's are becoming pretty common - especially with the recent releases of the MiNi CR2 and EZ CR2 before that. I'm not aware of any currently available, and this is the first I've seen mention of the Juice cells. Member/dealer AW used to offer protected RCR2's, but they haven't been available for a while. I think he still offers 300mAh unprotected cells, and last time I checked, Lighthound still carried them as well. There's also Ultrafire-branded 3.0V RCR2's at DX, but I have no experience with them, and I'd be surprised if you get half the claimed capacity (800mAh) from them.
Stillphoto
Flashlight Enthusiast
For what its worth, I got 4 juice cells and a charger when I ordered a blu-ray laser pointer a while back.
I've been using one set in the pointer, and the other 2 have been rotated in my Peak...crap I don't know which model it is but it has a Seoul P4 in it and is tiny. I had them build me the ultra power version and the juice batteries run very nicely in this setup.
I prefer protected batteries, and as said, the aw's are impossible to find. I've found these perfectly easy to use.
I've been using one set in the pointer, and the other 2 have been rotated in my Peak...crap I don't know which model it is but it has a Seoul P4 in it and is tiny. I had them build me the ultra power version and the juice batteries run very nicely in this setup.
I prefer protected batteries, and as said, the aw's are impossible to find. I've found these perfectly easy to use.
SmurfTacular
Enlightened
Was that blu ray laser you bought custom made from Ohrenberg?
Stillphoto
Flashlight Enthusiast
Indeed it was. Bought it through a second party, not direct.
SmurfTacular
Enlightened
I'm psychic :tinfoil:
LumenHound
Flashlight Enthusiast
I purchased 4 of the Juice branded RCR2 cells from the US importer last year. They all showed nearly identical capacities when charged and discharged on a Triton.
The discharge numbers I got were:
311 mAh at 100mA discharge rate
247 mAh at 200mA discharge rate
239 mAh at 300mA discharge rate
235 mAh at 400mA discharge rate
227 mAh at 500mA discharge rate
HarryN
Flashlight Enthusiast
I have not checked recently on the Juice brand, but in the past I chased the R CR2 aspect pretty hard, as I was working on a CR2 based light for a while. (The Breeze light in my sig line)
The AW protected R CR2 cells were the only ones that were fully protected.
The Juice cells - at least at that time, had very limited protection. I cannot remember the details, but I decided that they had too much liability for my taste.
That being said, the good news is that the Li content of a R CR2 cells is relatively low compared to a R 123 type, so I suppose in theory, the extent of damage from an "event" is probably lower.
An "indication" of this (not proof) is that there have been a few CR2 lights that discharged the cells at 5C, and the failure mode was consistently "not holding a charge", vs "event".
If I were going to use a "not fully protected Li Ion CR2 cell, I would use them not more than 5 cycles and toss them. They aren't that expensive relative to primary CR2s.
The AW protected R CR2 cells were the only ones that were fully protected.
The Juice cells - at least at that time, had very limited protection. I cannot remember the details, but I decided that they had too much liability for my taste.
That being said, the good news is that the Li content of a R CR2 cells is relatively low compared to a R 123 type, so I suppose in theory, the extent of damage from an "event" is probably lower.
An "indication" of this (not proof) is that there have been a few CR2 lights that discharged the cells at 5C, and the failure mode was consistently "not holding a charge", vs "event".
If I were going to use a "not fully protected Li Ion CR2 cell, I would use them not more than 5 cycles and toss them. They aren't that expensive relative to primary CR2s.
The scientific approach would be to
1) Make sure your charger isn't overcharging the cells (anyone without a DMM shouldn't touch RCR2s). This excludes also all chargers with a rate more than 300 mA and also CC-only chargers.
2) Make sure your flashlight isn't overdischarging your cells (with the DMM).
If you do this with unprotected cells then you are better off than using a protected cell and just guessing.
LumenHound
Flashlight Enthusiast
That's interesting.
Given your experience with RCR2 cells and knowing what you know, what do you think people new to the pros and cons of RCR2 rechargeable cells should be aware of?
HarryN
Flashlight Enthusiast
Hi - given the importance of the topic, I will go back and try to dig out some notes I have on the topic, as well as some historic postings about CR2 cells on CPF from the past.
This is going to take a few days.
I don't claim to be a battery expert by any means, so you should not take my comments as being such, just an end user that did some reading and thinking about the subject at one time.
This is going to take a few days.
I don't claim to be a battery expert by any means, so you should not take my comments as being such, just an end user that did some reading and thinking about the subject at one time.
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