carnage
Enlightened
Does non rechargeable CR123 has the same safety concerns as rechargeable CR123?
I remember reading on the forum there were a certain brand of cr123 that had reliability/quality issue, I don't remember which one they were but it has been awhile.
Do you have to keep on checking voltage with non rechargeable cr123 when use in pair to make sure the voltage stay kind of close to each? Can you use the non rechargeable cr123 til they are completely dead or can't power a device anymore?
What kind of safety issue does any non rechargeable lithium battery have?
All USA made CR123a cells are built by Panasonic and rebranded with various labels. I don't know all the wrappers, but but the red Surefire cells and the blue Battery Station cells are USA made Panasonics. These are all I use and I consciously avoid CR123 cells from overseas.
It is good practice to check the voltage of any lithium cells prior to using them in series, although it is generally unnecessary to check them continually throughout their life cycle. I would, however, check again for matching voltage on a pair of 123's that have been in long term storage.
There's no problem with discharging primary 123's completely, since they will not be recharged. They should also be electrically insulated during storage and transport.
Is there any CR123A by Panasonic made in Japan or just look for strictly USA made CR123A?
What's a good time span to check for matching voltage monthly or yearly?
By keeping them electrically insulated you mean not to let the battery touch each other or ground out on each other?
Hello Carnage,
With a single cell application there are no issues running a CR123 cell down to nothing. The problem comes with multi cell applications.
In a multi cell application the cells can have a mis match. This allows one cell to reach full discharge before the others. Under some circumstances the other cells may try to reverse charge the empty cell. With adequate current this can result in the empty cell "rapidly venting, sometimes with flame." In this process hydrogen fluoride gas can be released, parts can fly across the room with enough velocity to puncture dry wall, the heat generated can damage things close to the incident site, and so on...
All of this makes for a "less than ideal" day and there is the possibility of short and long term physical harm.
The take away is that there is danger associated with stored energy. If you take proper precautions you avoid those dangers. If you push things to the limits you expose yourself to these dangers.
One way to minimize these dangers is to replace the cells before they are completely used up. Pick up a single cell light that you can use the used cells in to drain the last little amount out of the cells. If you lose track and find that your multi cell light suddenly goes dim, immediately shut it off and remove the cells. Any cell that is extremely hot should be isolated outside to get it out of your living area.
Usually there are no problems. With additional knowledge you can come up with a "what if" plan that will keep you safe. If you loan your light to others to use, pass along the extra information to help protect them as well.
Tom
With the recent and rapid improvements in efficiency and emitter tech, this is one main reason why I have almost entirely converted to single-cell powered flashlights, for routine purposes.
While I do still have and use multi-cell flashlights when very high power output is essential, that covers perhaps < 5 % of my general lighting needs....
In a single cell flashlight all you have to do is checking voltage so the cell doesn't drop below a certain voltage or is there more to it than checking voltage?
In a single cell application, there's no need to check for voltage. You only need to take that precaution in multi cell lights. The danger of mismatched voltage is that the cell with the higher voltage could charge the weaker cell, which could lead to thermal runaway.
I understand the concern, but I think that lithium primary cells are safe when shown the proper respect.
Is there any danger with lithium cell that are in something like the Nitecore Tube, Thumb, Tip or charge them and enjoy? I was planning on getting somebody one of the Nitecore product and they know completely nothing about proper care of Lithium cell and I'm not sure if it's a good idea.
I have to learn about the respect they deserve. That why I have alot of question.