10440's

Batteries and Chargers Rechargeable Batteries
2

You don't start a topic under 5 pages, do you? Or as Boaz would put it... "I was interested in a RC-29 .... and now I want to kill myself." ;-)

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LOL...Kreisler has a way with his topics. But he does a wonderful job and is VERY thorough.

From his review on rc-29 I couldn't resist ...and it is a VERY NICE torch indeed.

QUALITY little piece. Keep it up Kreisler !!! Cool

Now back to topic 10440...

4

Another fine essay, kreisler! Makes me want to stick with Eneloops.....

5

I ended up cutting the pcb out of one of my 10440s for my itp…

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LMAO, kreisler :bigsmile: Great job, man ;)

Those gray UF are much longer than blue UF :O (much longer than I expected :| ). Blue UF will fit better for sure, but you have to test the cell from time to time, just to have the V under control.

7

Dang Kreisler, this is a heckuva thread and timely too! I'm looking for quality 10440's so I'm going to be spending some time reading this whole thing. Thanks for posting all the thorough details!!

8

19 weeks dedicated to test self discharge? Thanks kreisler!

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thanks for your interest guys! the self-discharge test for the 1 blue cell is still ongoing since i dont need it. i use the grey protected in my Tank E09 and the blue unprotected in my LD01. i hardly use my ITP A3 anymore and i would feed the identical blue unprotected. that's how i can continue to measure the remaining offline voltage of the 2nd cell (which i had marked with a red Sharpie/Edding).

the grey protected cells seem to hold the charge much better than the blue unprotected ones but it doesnt make sense to do self-discharge tests with them because i use them all the time (aged cells!) and it takes only ~50mins to recharge a completely drained 10440 cell (they typically hold 320-350mAh capacity).

as a general statement we could say that 10440's drop in remaining offline voltage at a higher pace than the bigger round cells (14500, 18650, ..), which was to be expected, but that's no big problem because recharging 10440's takes only 50mins (with the 300mA charge rate setting of the WF-188).

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Very much appreciate your solid efforts!

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You didnt measure load voltage there. Load voltage could be anywhere between 0.1V lower or 1V lower.

12

Wow, food for thought. I have bunch of the old blue 10440’s . I use them all the time in applications
that were never intended to get such a kick in the A—…-. Does the same apply to 14500’s , in general terms?

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Think I should share this information from my pm with kreisler.
(I have reformatted the pm and removed some other unrelated content.)

15

I saw the bottom of kreisler’s post.
“UltraFire Gray Protected red marked cell 254mAh-0.1A (repeated tests: 261mAh, 260mAh), or: typical if not charged fully to 4.200V: 245mAh) UltraFire Gray Protected *unmarked cell* 225mAh–0.1A, rest offline voltage 3.3V (repeated test: 229mAh)”

What is does it mean by red marked cell and unmarked cell?

16

remember i bought a PAIR of cells?

it is to distinguish one cell from the other.

i use a marker to mark one cell.

Thanks for sharing the PMs. Now everybody can see that kreisl is a nice guy helping fellow boardies in need ftw. i am the best!!

hehe..

17

How we do say here, no tienes abuela, eh? :stuck_out_tongue:

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What does that mean? From my meager understanding of Spanish "you don't have a grandmother eh?"

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Hi scaru
Yes, that is. If you don’t have a grandmother you need someone else (kreisler itself!) to do compliments / praise / be kind on yourself.

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Thanks. :)

21

Couldnt figure that one out so I went to google translate. Does that mean "praise own shit safe"?