Just remember to stop charging when they are full, then it will work fine.
What happens if the cells are charged with less termination current?
I have seen you always charge them until 0.1A…
Lower termination current will charger the cells more.
I have been testing it: http://lygte-info.dk/info/BatteryChargeVoltageCurrent%20UK.html
Has anyone a hint how to identify the manufacturing date on these LG cells?
I have a bunch of the 4.30v Samsungs, and I use a DC-DC converter board to finish the charge from 4.20v off the hobby charger. I monitor voltage while charging and manually adjust voltage across the cell to 4.30-4.31v, as the cell gets more full the voltage will blip up to 4.31-4.32v, at which point I turn it back down to 4.30-4.31v, and continue doing that until it stops increasing. Resting voltage after ~1 hour tends to be 4.29-4.30v.
Just doing this last little bit manually doesn't really even need the ability to limit the current, starting from 4.20v the cells will only take around 0.4A each with the voltage limited to 4.30v even with the current limiter pot cranked up past 3-4A..
Are those from FT? Did you get the cheaper or more expensive ones? I can’t tell what the difference is….
I think the J on second line means 2010 as in J is the 10th letter in alphabet.
I bought some earlier in January from ebay that had L meaning 2012.
Fasttech’s site also show picture of cell that starts with L.
Interesting, your link to Fasttech has them at ~$8
But here is another link to Fasttech that has them for $12.82.
Maybe the higher priced ones are newer?
HKJ’s picture shows K 2011 and has the old bottom with open metal.
Are yours similar to his bottoms?
The new ones have bottoms that are slightly less exposed on the edges that look like this:
Is the labeling just a guess or have you read it somewhere else? I couldn’t find any explanation for LG cells…and what do the other numbers mean…?
Mine are the cheap ones and they have the bottom like on hkjs picture and not like on your photo or the fasttech picture.
On fasttech pictures both have a beginning L…but your explanation would explain why these were cheaper…
They arrived both at around 3.7V without a case and I wouldn’t bother to buy such good cells even when they were 3 years old for 4.3$, but I would like to know it…
Measured capacity match the results from HKJ, I think they are perfect for my nanjg modded lights.
The date J (2010),K (2011), L (2012) is just my guess.
I am also speculating on the 2 fasttech prices.
I haven’t ordered from them, I got mine from ebay seller located in S.Korea where the batteries are manufactered.
I do have the LG D1 4.35V data sheet but it does not say the date codes.
If you want, pm your email and I can send you the data sheet pdf.
and AlexTG said...
from Post
<$7 each at mtnelectronics - you probably know that by now though.
eBay seller - $53 for (6) from South Korea
illumSupply >$7
HKJ or anyone else, are these LG D1s still the best option for lights running at ~3A?
Meaning these cells can keep ~ 3A high level longer than any other cells?
Also HKJ, I’ve noticed now when I go to your 18650 comparator on my phone browser (haven’t checked laptop yet) I am unable to choose any battery above the letter “E”. You have them listed alphabetically and the the list starts with Eagltac 18650. So no A thru D name listed.
Thanks
That must be an issue with the phone, I have not changed the code for some time.
That’s odd, I was able to use the comparator fine before.
Anyone else with an iPhone (safari browser) willing to check this issue?
I can confirm that it starts with the eagletec, but there are no 18650 with A-E that’s why.
There supposed to be quite a few like AW, AWT, Calicustoms, among others.
Sorry, I did check it now and the first part my cell cell list is missing for some reason. I will rerun the list builder script and see if it fixes it.
It looks better now.
Working perfectly now, Thanks!
Well looks like LG D1 is still king of 3A from your test.
The new 3500mAh cells NCR GA, LG MJ1, SDI 35E are better in this regard, at least according to my tests:
Thanks light-wolff, out of the 3 new 3500mAh cells you mentioned in another thread that the NCR GA are the top cell.
I will try them out, first need to find a US seller for these!
EDIT: Cool, mtnelectronics has them in stock!