Test / Review: Sanyo UR18650FM 18650 2600mAh

ah ok… thanks for the additional info

Hi Jacky,

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?

Is there any difference between UR18650FM and UR18650F? (I do not find anything about FM, only about F on Sanyo/Panasonic site)

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 :slight_smile:
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, …

I’ve seen some crap on Panasonic site, never understand what is Sanyo doing there in descriptions of some batteries. Basic stuff there only no pics.

No F is not FM.
There is many batteries and many Fs:

Code stated mAh ring sleeve Volt
UR18650W2 1500 pink red 4.2
UR18650FJ 2200 red red 4.2
UR18650A 2250 violet / white red 4.2
UR18650FK 2400 green red 4.2
UR18650FM 2600 teal blue red 4.2
UR18650ZT 2800 violet orange 4.3
UR18650ZTA 3000 yellow violet 4.35

And many more!

The ring color denotes capacity.
The cover color probably indicates different voltage.

Panasonic Buys Sanyo for Its Batteries as reported in December 2009

Thanks, I was just looking at these and the 2800’s for practically the same price
http://www.fasttech.com/products/1420/10001901/1143804-sanyo-ur18650zt-18650-2800mah-protected-rechargeab

Can you take a real life measurement of the Diameter? I know itt says 18.3mm but sometimes they are off.

I know that :wink:
But I do not know these:
Is there any difference between UR18650FM and UR18650F?

Yes.

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. :frowning:

Yes, I forgot about the protection!
It kicks in on my FMs as well, they do stop at 4.15V?
My TF 26650s stop at 4.21V.

So yes, you need a protection designed for 4.3V cells, and so on.

I’m glad I really stick to the older FMs, see the ZT thread and probably go there to post questions about ZTs.

Ok I foud it.

UR18650FM=UR18650F, but not always :stuck_out_tongue:
You have UR18650F group. And in that group you have UR18650FM, UR18650FK, UR18650FJ,…

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.

FM= 2600mAh
FK= 2400mAh
FJ= 2200mAh

Lol I’m dumb, see I forget, I even have it in the table up there few posts up XD

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

Yep, these batteries will work just fine. :)

Thank you.

Thanks very much for the review! Frontpage’d and Sticky’d.