I try very hard to be honest, but sometimes I don't have the equipment to do the best tests possible.
Beyond 1A discharge my tests aren't reliable - as in not one of my chargers can give reliable results past 1A. Can run a datalogging meter on current past that on the rare occasions I boot the only box running Windows around here. Last booted it in March.
But integration is not one of my skills. I last had to solve multi-variable differential equations in 1982. And have exactly no wish to remember how to do it 30 years later.
"Arrived yesterday, thanks! No time for testing yet, but resting voltage is at 3.9 a tad high but no real problem. Anyone done a 10A discharge on these yet? I am very curious how they will hold up compared to AW IMR 18650 for an SST90 build. Not sure if my iCharger 106B+ will even handle that kind of load without an external resistor (and I haven't figured out how to do that yet either.)"
I don't think I would try a 10A discharge test! Panasonic recommends 6.2A as max. The 106B+ is rated at 20w max discharge, something like 170w with a external resistor the setting should be under discharge+. I have found on mine it will go really quickly up to 4A then slow way down and sometimes take 10 minutes to get to 5A. I'm not sure if this is a battery or a charger thing?
I was reading on a RC board that the 106B+ has some pretty small resistors so you may want to wait till you get an external resistor setup before you try any big discharge tests.
Yah, wish I had sprung for the 206B now. Hobby king shows up to 7A discharge current, but like you say, limited to 20W. Have to look more into using a 50W external resistor.
A 2C discharge rating seems rather conservative to me. If I had the equipment I would seriously consider a 3C test, but I guess not at this time :) I thought I saw the original NCR18650 2900 drawing nearly 9 amps in an sst90 build.
Well, no time for even basic discharge tests again until at least Sunday. Boo. Real life.
I've already done a couple 5 Amp discharges of these (with good results). This afternoon I started a 0.6A discharge hoping that I could get around 3000 mAh (Panasonic states a minimum of 2950mAh). Well I got 3100mAh on the nose! Holy moly.
I'll be doing more tests and posting the results in my battery graph thread next week.
2C is generally considered the safe limit for the discharge of LiCo cells.
We just ordered another shipment of batteries... We also ordered some new high drain 18650 Panasonic batteries. These should be some really good performers! 2250mAh and 10A max discharge rate. They are manufacture rated for multi cell use and have very long life!
These cells where originally developed for power tools and medical equipment. Like all Panasonic batteries I would expect them to come in very close to their rated output. We should be getting them in within the next couple weeks hopefully sooner
PS... If anyone out there wants to review these batteries let me know, you will have to be able to do high drain tests and post graphs. Thanks
"from everything i have read. worth the price of 4 TF flames? not to me."
Its like saying I could buy 4 Ford Escorts for the price of 1 BMW... Their really not in the same league. You will also note I am selling them for much less than the Redilast 3100's and less than the AW 2900. But thanks for the input!
and i agree with the escort vs bmw scenario. the difference is i can have one tf in my light and three back-ups in my pocket, but i cannot drive one escort and have three back-ups in the trunk. again, to each their own.
The Escort isn't a trustfire flame. It's more like an ultrafire 3000. It goes a while on a fillup, if you don't mind it taking a very long time to get there, and it failing in a month. But you can buy 8 of them instead of 4 or 1.
I guess I never did come back to this thread. I posted some discharge tests in old4570s thread on CPF. Nothing too extensive, a 3.1A and a 5A test. Any data is useful, right?
" I am boycotting suppliers that will not ship to Canada... AW & Redilast will ship at reasonable rates."
LOL! #1 If a seller is not already shipping to Canada then what is the point of boycotting someone who won't do business with you?
#2 We do ship to Canada via Priority Mail !!!!
#3 Why all the negative comments on a SELLERS POST? Its like coming to my business and telling all my customers why not to do business with me while you have NO INTENTION OF BUYING ANYTHING! Guess what would happen to you
"The Escort isn't a trustfire flame. It's more like an ultrafire 3000. It goes a while on a fillup, if you don't mind it taking a very long time to get there, and it failing in a month. But you can buy 8 of them instead of 4 or 1."
I actually had an Escort wagon for a couple years till it got rear ended. It was the classic old Grandma car in perfect condition with about 40K miles. The rear end was in perfect shape! The bumper only had some scratches, no dents the tail lights where not even broken. It buckled and was about 8" higher in the middle, the seat broke and the front doors wouldnt open. Ohhh good times
"Would those be the IMR cells everyone is talking about, XXLLMM?
If I'm not mistaken, they can also be charged at a much higher rate.
Will they be protected or not?"
From what I can tell their Lithium-Ion but not a standard Lithium. The information is kinda vauge as the the chemistry but they are "Solid solution technology" They claim they are as safe as IMR cells with the capacity of Cobalt based batteries.
Most IMR cells are rated at 15-20A discharge rates with a max capacity of about 1500-1600mah (my research) there is one guy selling 2400mah IMR on ebay but I did some checking and the numbers come back as 1500mah Chinese cells.
I think these are going to be great flashlight batteries for high drain lights. How many people really need a 20A discharge battery? I think the extra capacity is well worth the trade off.
Their going to be unprotected with shallow button tops so you can use them in multi cell lights.
"we really want to get some people to try these out so we are dropping the price to $13.95ea!"
In the above statement it should read some american people.
On the international site it's $ 23.90 for one protected battery.
Did I miss something?
For 13.95 I would order some right away, but at for 23.90 each I can wait. It says, the price includes $ 6.00 for shipping (that makes 17.90 for the battery, right?) Why? I'm confused. I really would like to have some, but not for this price.
