Test / Review: Sanyo UR18650FM 18650 2600mAh

Because sanyo 2800mAh, should be charged to 4,35V to have 2800mAh capacity. Battery protection allow only about 4,2V. So 2600mAh could have more mAh than 2800mAh.

Search Sanyo UR18650ZT I believe, they are newer 4.3V cells, been asking similar questions before buying the 2600mAh, look around you will find it :slight_smile:
They are not bad but are 4.3V and won’t give you 2800mAh without going to 4.3V and maybe even then they might be slightly over rated.

I went with the older and proven UR18650FM.

4.3V

UR18650ZTA is 4.35V @ 3000mAh.

Ahh! Thanks for the info guys - definitely going with the 2600mah then :slight_smile:

yes, sure , I made a mistake. Thanks

You can calibrate the voltage of the b6 charger, look at hobbyking manual.

Cannot, covered it in another thread somewhere, I have a limited version that has Lixx internal resistance testing, can’t be calibrated by entering the startup configuration mode by holding buttons, I have tried all combinations before. Only option would be to modify the firmware or adjust the sensing resistors or something, none of my equipment is calibrated so it’s impossible anyway.

It also doesn’t have logging output, only temp. probe in the options.

hmm - any more info on this? I have 4x of these which I ran in my firefoxes 3 in series which supposedly pulled 4a fine… the cells got warm but i didnt notice any sag?

I am running the same 4x in my skyray king now but i guess the currents much less because the 4 of them are in parallel.

I am curious now, I think I might throw mine on my hobby charger this weekend to see whats up lol.

thanks for the review!

Well I have only one flashlight, sure I could dig out some resistors and measure Amps with my DMM, I’m quite sure the battery can supply tons of Amps, at least if you look at discharge graphs in some other tests, they do test it at 5A.

I think it is the driver or emitter in my flashlight, it overheats quickly with so many Amps, heat rises, resistance increases, Amps go down.

Comparison graph, Sanyo FM, ZT, Panasonic A, B.

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: