18650 battery

In the bin, cells arnt 3000mah or even close lucky if they are 500mah. And are a fire risk. You never know what your going to get. If lucky a very old worn out laptop pull. Sometimes its smaller 10440 cells inside with sand around it to make it weigh right. Sometimes even smaller batteries then that. Just look at some of the disassembly threads of ultrafire 18650s.

They kind of remind me of energizer c and d nihm cells. Its just a larger battery case with a smaller cell inside

I agree with Speed4goal. Ultrafire batteries are as bad as they come. I’d get rid of them and get some decent cells like Panasonic, Sanyo, Samsung, LG, or Sony’s. I like Efest when it comes to 10440’s, 14500’s, 18350’s, and 26650’s because none of the brands I mentioned make those sizes.

I figured as much just thought I would ask …… it’s a good thing I have some Sanyo NCR18650GA 3.7V 3500mAh on the way then .

Excellent battery. I have several flat tops I use in single cell flashlights.

Well, not so fast…

I, like many of us, have gotten many batteries with extreme cheapy lights. And yes, most all of them were worthless.

I like to test them in one of my li500 out on the patio, just to make sure they are junk. I always keep an eye on the temp and if they start to get hot I abort the test and can the battery in an ammo box for future recycling.

A month ago won a $1.78 light on eBay. Came with charger, uf battery, holster, bike mount, and a ultrafire e6.
Tested its purple ultrafire “5000mah 4.2v” battery and to my surprise it was a 3000 mah good battery as per my lii500. Tested it 3 times and all results came out the same, 3000 mAH.
Popped it in my high draw light and it pulled 6+amps…!!! something many of my laptop pulls won’t do in that light. Been using it ever since. I consider it one of my better batteries.

So, might want to test those cheapy batteries that comer with cheapy ebay lights. Not often, but once in a while you might get lucky…

jmo

Even though it performs satisfactorily for you, it likely does not have any PTC (pressure valve) or CID (current interrupt device) to protect against high pressure and over temperature. It is not possible to know unless you dissect one or wait until it explodes. These are internal cell parts separate from any protection circuit added to a “protected” cell. They are often left off of low quality cells like this to cut manufacturing cost, this is how they can be sold more cheaply than reputable brands.

An example that you can observe yourself - take a look at the button top on your cell, do you see any vent holes?

Interesting, did not know that. Do all (any ?) laptop pulls (sanyo, samsung, sony,etc,) have CID/PTC…?

ok I just looked at the add for my SANYO cells and they say that Panasonic make them

if so why would someone tell me that the SANYO cells are better ?

They are listed here as Panasonic/Sanyo cells. Are Sanyo cells better than Panasonic? I have no idea to be honest. All I can say is I’ve been using Panasonic cells for years without issues.

ok …… I wish I could get them at that price as their $12 on average here .

Panasonic owns sanyo, each cell has its own name. Panasonic’s 3400 cell is the NCR only good for around 6 amps. But sags heavily after 4 amps. The sanyos 3400-3500 cell is the sanyo GA. 10 amp rated cell. Its developed by sanyo, sanyo never recovered from a major earthquake and Panasonic owns it now. Might not see to many new cells with a sanyo label on it. Essentially they are the same company now. All the high drains are comparable. Sanyo/lg/Samsung 10amps you couldn’t tell a difference in the 3 lights you have. And the 20+amp cells are all similar. 30q/HG2/VTC6/ etc

You won’t go wrong with Panasonic or sanyo cells. I recommebrd the sanyo cells since they are the same price as the Panasonic outdated NCR B cells. And said if you ever get more powerful lights that draw over 3 amps you already have cells now for it. Panasonic makes good cells all the big manufacters do. Sanyos plant was hit during a massive quake. And just never recovered fiancialy completely. Panasonic bought them out to get their battery formulas and technology. They let sanyo keep operating with its name for the time being but that may change in the future.

Like Walmart and samsclub two different companies but both owned by walmart

To the OP I have 3 of these lights & for the money they are great little lights :+1:
I tested the claimed 3000mah “crapfire” cells that came with them & got 600-800mah iirc & very high resistances & after charging voltage dropped like a stone :frowning:
They are very very poor cells.
I recycled mine.

thanks all .

and thanks Speed4goal that sounds about right for these days so I will use what I have coming

and will get more for my c8 and 2 olight M3X and it looks like I will get another 2 or 3 c8 for

the money they are a great light + I ordered an OP reflector for around the house and yard .

cheers D

Yes! :+1:

well this is getting interesting ……… I ran one of these cells down to 3 volts and then put it in

the charger and after 15mins it was at 74% so I thing this is one of them 3000mah cells that

hold 300mah haha .

EDIT charge rate is 1A

EDIT 2 it took 1 1/2 hours to charge so about 1100 to 1200 mah

ok I was doing some research on batteries and because the ones I have coming are SANYO

NCR I found this …… the chemistry of the NCR is LiNiCoAlO2 so the question is can I charge

these on my XTAR SV2 Rocket charger as this is all that is listed Li-ion/IMR/INR/ICR not the

NCR cells .

cheers D

Yes charge away. Any 3.6/3.7 lithium cell is fine. They charge up to 4.2 volt. Cells are rated by nominal voltage.

I see one of the “tips” in the SV2 Rocket manual is to manually reduce the charge rate from 2A to 0.50A when the battery is “almost full”. I suppose this gives a more accurate termination point?

hmmm now where is my manual

Angler wrote:
“An example that you can observe yourself – take a look at the button top on your cell, do you see any vent holes?”

Is this the vent holes you’re asking about…? There are 2 of them on opposite sides.