XTAR batteries measurements (physical)

Batteries and Chargers Rechargeable Batteries
1

There were some reports these migh not fit some flashlights. I'm curious what numbers yours are?

Mine are (diameter, length) sticker included:

XTAR 2400 mAh - 18,2mm, 68,1mm

XTAR 2600 mAh - 18,3mm, 68,3mm (by removing the sticker it should be same as others if need be, or so it seems)

XTAR 3100 mAh - 18,2mm, 68,1mm

XTAR 1800 mAh - 18,1mm, 68,1mm

These are all i have in multiples and no other brands in this form factor to compare. Had a few Hi-MAx but never kept any. I find fitting them not an issue but some do, can you take measurements? Just curious. If someone care posting results for other brands might be usefull too.

A word of caution! I used some non conductive foil to measure the batteries length and had the foil thickness subtracted later. It's generally a bad idea to short them even with protection PCB on it. Carefull! :)

2

I quote old4570, from his review : https://budgetlightforum.com/t/-/1762

His seem all to be bigger than yours Budgeteer.

3

I have some 2600 mAh, will check tonight when I get home. Glad you mentioned shorting, I didn't think about that. I have a nice metal digital caliper that I won't use - glad I kept my cheepo plastic one.

4

Indeed they are. I double checked my measurements and found them pretty cosistent. At max there should be some margin of error about 0.15mm but that's it. I have a non digital caliper (a brand one) but my eyes have yet to fail me (thank god i still see like an eagle at 35)

This is the last XTAR incarnation of the 18650 form factor the 3100. I made the shot just for you (others may still look at it :P ) and because my camera was at hand along with the battery. :P

Pretty curious what others will find.

5

Is that the way you have measured the diameter? or it was just because you couldn't take the photo?

6

kreisler wrote:

note: i didnt use any foil. just the cell and the digital caliper.

7

Just for the photo. In fact i dropped the battery several times before positioning it that way. :P

8

Using a metal digital caliper is not a problem, just but some sticky tape on it and the zero the readout.

I have some Xtar batteries scheduled for my test and the size I have is:

2400 mAh: Ø:18.8, l:69.6

2600 mAh: Ø:18.6, l:69.6

When measuring the diameter I am rotating the battery to get the thickest part, i.e. where the wire is.

9

Oh i did not rotate mine. :/

l:69.6?!? Really?

Did try rotaing it now. Pretty the same. I'll have to redo the others perhaps but i think it will not matter much.

With some insulation tape i measured the length now to 68,3 including the tape.

10

There is always some point where the battery is thicker, when rotating. That is unavoidable due to the construction.

I checked with another digital caliber and the result is the same (or maybe 69.5).

Note: I have two of each battery type and always specify the maximum measurement from the two batteries and I prefer to round up.

11

Thats how i did it. The margin of error is around 0.15 due to the lack of digital readout and it's left for analogic interpretation. Perhaps my caliper is not that great (it's older than me). Let's wait the others. I did maesure 2 pairs of each. Have a few more and eventually i'll measure them.

Still there is quite some margin. It seems mine are around 1mm shoter and 0.2 less thick.

12

2 x 2600mAh:

18.56 x 69.2
18.57 x 69.4

13

Borrowed another random batch XTAR 2600:

Diameter (throughly checked): 18,4mm

Length (throughly checked): 68,5mm

Weird. So it seems that those who got a funky wrapper might get issues in very tight flashlights. The length difference i do not understand tho.

My batteries are from early batches. The last one i measured was bought around a month ago.

How are other manufacturer cells compared? AW, SF, UF/TF/XyF, HI-MAX doing?

14

4 - Xtar 2600 protected... 69.5 +/- .1 long, 18.6 dia +/- a hair, depending on whether the label was over the protection circuit strip.

Purchased November 2011

15

Funny how they are differing so much (I guess it's a lot). I pulled out my two Callie's Kustoms to compare, they both come in at 18.3, 68.1.

I originally bought the pair for my SolarForce M8 but out of curiosity decided to check them in my other lights; They fit in every flashlight I have except the N-Light ST50. Very tight fit and the spring in the cap is so compressed the light won't even come on.

16

I've mentioned in some threads that I have problems fitting my 2600mAh XTAR's and now I know why.

My measurements (done with an analog caliper)

Battery 1: 18.8mm , 69.8mm

Battery 2: 18.8mm , 69.7mm

I've also measured my AW 2900mAH (3 raised dots on the negative end, I measured over them)

Battery 1: 18.4mm , 67.9mm

Battery 2: 18.4mm , 67.9mm

I need to take my XTAR batteries on a diet.

17

Two Xtar 2600mAh =

1. w/18.57mm, l/69.39mm

2. w/18.54mm, l/69.45mm

Two Xtar 3100mAh =

1. w/18.68mm, l/69.02mm

2. w/18.58mm, l/69.00mm

18

here are my weight measurements ( i dont know which one was cell1 vs cell2 ):

cell1 : 48.231 grams

cell2 : 48.031 grams

There is a weight difference of (~exact) 200 miligrams. *yawn* not very interesting info, i know

19

Looks like the cells are physically equally wide but the insulating wrapper does it's job to add "random" thickness. Length must be a front and tail cap assembly thing. I really doubt the li-ion capsules have such tolerances. Afterall 2600's are SANYO based and there should be very minimal physical variance between bare cells. SANYO is a well estabilished battery manufacturer even more known as panasonic or sony and samsung in that matter.