Did you measure that internal resistance using the new Turnigy Accucel 6 LiXX Internal Resistance feature?
How do you do that for a single cell? I tried, but it does not give me any value - seems that I need a balance lead as well? On your picture, it seems you are using a special balance lead (with only two wires) - could you elaborate on that?
Yes, I’m not sure how accurate it is, if you have a precise/calibrated DMM and a resistor of appropriate value you can measure it that way.
I use the Turnigy’s feature.
Yes you need to connect it to the balance port obviously
That is how it works, charging port is for power, charge, discharge.
Balance port is for monitoring cells, measuring cells, balancing cells (low current).
Just connect the battery correctly to the balance port. From right: GND, cell1, cell2, …
Find the UR18650F, or rather get the specs from the source you’re buying them from, who knows what they are selling, they should inform the buyer.
If you already have them, just test them to find out capacity and so on.
UR18650FM 18.5mm diameter over the protection connection strip, otherwise 18.35mm.
Why would you buy ZT? If you can charge it to 4.3V, why not, otherwise it might actually be worse than FM if charged only to 4.2V.
I could probably charge to 4.3V on my Turnigy in LiPo setting, maybe, maybe to even 4.35V, I know my LiPo had around 4.3V when finished. Would have to charge it again to find out.
Otherwise you are out of luck charging over 4.2V, need a rare charger for it.
I have four pc of UR18650ZT, protected. I could not charge higher than 4.25v because the protection circuit switched off. Then the capacity was lower than for the FM version.
Yes I found out yesterday, there is a thread about bigmicro selling UR18650F.
Panasonic website has only UR18650F pdf, did not notice any info there though in regard to different code names.
I think the lower the second letter the older the type of cell and potentially lower capacity. FJ 2400, FK 2500, FM 2600, my guess.
I realize that these batteries can put out a lot of power, but if using a drop in that only draws 1.5A, will these batteries be OK? Specifically a Malkoff M61 drop in. Are these Malkoff drop ins regulated for input voltage or amperage?
This is weird. I posted this on 2-3-2013 and is shows listed after 2-26-2013. ?? Now it doesn’t, but I have the screenshot. Edited on 2-27-2013